---
title: Observed Form Bugs — Known Issues Log
description: Log of observed form bugs and edge cases, including a QR code load failure from Cyrillic lookalike characters in the form ID and its server error.
---

[Skip to content](https://go.sitemetric.com/sitemetric-knowledge-base/observed-form-bugs-known-issues-log#main-content)

English - United States

Show submenu for translations

![](https://go.sitemetric.com/hubfs/Icon__Wordmark_-_Horizontal_-_Red-1.svg)

- Home
- Products
- Pricing
- Blog
- Company

Open main navigation

Close main navigation

- Home
- Products
- Pricing
- Blog
- Company
- English - United States
  
  Show submenu for translations
- Contact us

 Contact us

 How can we help you?

- There are no suggestions because the search field is empty.

1. [Sitemetric Knowledge Base](https://go.sitemetric.com/sitemetric-knowledge-base?hsLang=en-us)
2. [Forms](https://go.sitemetric.com/sitemetric-knowledge-base/forms?hsLang=en-us)
3. [Troubleshooting Guide](https://go.sitemetric.com/sitemetric-knowledge-base/forms?hsLang=en-us#troubleshooting-guide)

# Observed Form Bugs — Known Issues Log

## Log of known form bugs and edge cases, including the Cyrillic form ID QR code issue

> This page is a running directory of **observed form bugs / edge cases**. Each entry should link to a dedicated write-up page with details, repro notes, impact, and any mitigation.

### Entries

- QR code form load bug — Cyrillic lookalike characters in form ID 
    - **Symptom:** form fails to load due to Cyrillic lookalike character in form ID.
    - **Server error:** `Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8mb4_unicode_ci,COERCIBLE) for operation`

-

---

### Add a new bug

1. Create a new subpage under this directory named after the symptom.
2. Include: 
     - Summary
     - What we saw (IDs, screenshots, links)
     - Error text (exact)
     - Repro steps (if known)
     - Scope/frequency
     - Mitigation / workaround
     - Owner / follow-up (if any)

QR code form load bug — Cyrillic lookalike characters in form ID

---

### Summary

A one-off issue was observed where a form link (from a QR code flow) attempted to load with a visually-similar \*Cyrillic\* character in the form ID, causing the form to fail to load.

### What we saw

- Expected form ID: `ZHFFMCSCA3`
- Observed form ID: `ZHFFMCSCAЗ` 
    - Note: the last character above is Cyrillic **З**, not the Latin **3**.
- If you copy/paste the two IDs and attempt to load the form, they look similar but do not match.

---

### Server error signature (if this happens again)

If we see a server-side error while loading the form like:

```
Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8mb4_unicode_ci,COERCIBLE) for operation
```

### Notes / hypotheses

- QR code appears to load correctly on iPhone.
- Suspected edge case where some scanners (often Android / third-party QR apps) may decode the QR text using a non-UTF-8 encoding (or otherwise misinterpret bytes), resulting in Cyrillic codepoints.
- Device language/region/keyboard settings may influence decoding behavior.

### Impact

- If a worker cannot open the form, they will likely raise it to the ACO.

### Mitigation / next steps (if it repeats)

- Consider generating a new form ID and updating/reissuing the QR code(s).
- For now, treat as a one-off unless additional reports come in.

- [Reports](https://go.sitemetric.com/sitemetric-knowledge-base/reports?hsLang=en-us)
- [Integrations](https://go.sitemetric.com/sitemetric-knowledge-base/integrations?hsLang=en-us#main-content)
  
  
  
  
  
    - [How-To Guide](https://go.sitemetric.com/sitemetric-knowledge-base/integrations?hsLang=en-us#how-to-guide)
    - [SOP](https://go.sitemetric.com/sitemetric-knowledge-base/integrations?hsLang=en-us#sop)
- [Internal - Reporting & Data](https://go.sitemetric.com/sitemetric-knowledge-base/internal-reporting-data?hsLang=en-us)
- [Support Request Types](https://go.sitemetric.com/sitemetric-knowledge-base/support-request-types?hsLang=en-us#main-content)
  
  
  
  
  
    - [General Inquiry](https://go.sitemetric.com/sitemetric-knowledge-base/support-request-types?hsLang=en-us#general-inquiry)
    - [Device & Hardware](https://go.sitemetric.com/sitemetric-knowledge-base/support-request-types?hsLang=en-us#device-hardware)
    - [Out of Scope](https://go.sitemetric.com/sitemetric-knowledge-base/support-request-types?hsLang=en-us#out-of-scope)
    - [Installations & Onboarding](https://go.sitemetric.com/sitemetric-knowledge-base/support-request-types?hsLang=en-us#installations-onboarding)
    - [Platform & Application](https://go.sitemetric.com/sitemetric-knowledge-base/support-request-types?hsLang=en-us#platform-application)
    - [Data & Reporting](https://go.sitemetric.com/sitemetric-knowledge-base/support-request-types?hsLang=en-us#data-reporting)
    - [Account & Billing](https://go.sitemetric.com/sitemetric-knowledge-base/support-request-types?hsLang=en-us#account-billing)
- [Internal - Agent & Bot Guidance](https://go.sitemetric.com/sitemetric-knowledge-base/internal-agent-bot-guidance?hsLang=en-us)
- [Product & Platform](https://go.sitemetric.com/sitemetric-knowledge-base/product-platform?hsLang=en-us)
- [Notifications & Messaging](https://go.sitemetric.com/sitemetric-knowledge-base/notifications-messaging?hsLang=en-us#main-content)
  
  
  
  
  
    - [SOP](https://go.sitemetric.com/sitemetric-knowledge-base/notifications-messaging?hsLang=en-us#sop)
    - [How-To Guide](https://go.sitemetric.com/sitemetric-knowledge-base/notifications-messaging?hsLang=en-us#how-to-guide)
    - [Troubleshooting Guide](https://go.sitemetric.com/sitemetric-knowledge-base/notifications-messaging?hsLang=en-us#troubleshooting-guide)
- [Core Support Operations](https://go.sitemetric.com/sitemetric-knowledge-base/core-support-operations?hsLang=en-us#main-content)
  
  
  
  
  
    - [SOP](https://go.sitemetric.com/sitemetric-knowledge-base/core-support-operations?hsLang=en-us#sop)
    - [Reference Guide](https://go.sitemetric.com/sitemetric-knowledge-base/core-support-operations?hsLang=en-us#reference-guide)
    - [Troubleshooting Guide](https://go.sitemetric.com/sitemetric-knowledge-base/core-support-operations?hsLang=en-us#troubleshooting-guide)
    - [Handbook](https://go.sitemetric.com/sitemetric-knowledge-base/core-support-operations?hsLang=en-us#handbook)
    - [Directory/Catalog](https://go.sitemetric.com/sitemetric-knowledge-base/core-support-operations?hsLang=en-us#directory-catalog)
- [Reporting & Data](https://go.sitemetric.com/sitemetric-knowledge-base/reporting-data?hsLang=en-us#main-content)
  
  
  
  
  
    - [Reference Guide](https://go.sitemetric.com/sitemetric-knowledge-base/reporting-data?hsLang=en-us#reference-guide)
    - [Troubleshooting Guide](https://go.sitemetric.com/sitemetric-knowledge-base/reporting-data?hsLang=en-us#troubleshooting-guide)
    - [Directory/Catalog](https://go.sitemetric.com/sitemetric-knowledge-base/reporting-data?hsLang=en-us#directory-catalog)
    - [SOP](https://go.sitemetric.com/sitemetric-knowledge-base/reporting-data?hsLang=en-us#sop)
    - [How-To Guide](https://go.sitemetric.com/sitemetric-knowledge-base/reporting-data?hsLang=en-us#how-to-guide)
- [Admin Portal How-Tos](https://go.sitemetric.com/sitemetric-knowledge-base/admin-portal-how-tos?hsLang=en-us#main-content)
  
  
  
  
  
    - [How-To Guide](https://go.sitemetric.com/sitemetric-knowledge-base/admin-portal-how-tos?hsLang=en-us#how-to-guide)
    - [Handbook](https://go.sitemetric.com/sitemetric-knowledge-base/admin-portal-how-tos?hsLang=en-us#handbook)
    - [Directory/Catalog](https://go.sitemetric.com/sitemetric-knowledge-base/admin-portal-how-tos?hsLang=en-us#directory-catalog)
- [Forms](https://go.sitemetric.com/sitemetric-knowledge-base/forms?hsLang=en-us#main-content)
  
  
  
  
  
    - [Troubleshooting Guide](https://go.sitemetric.com/sitemetric-knowledge-base/forms?hsLang=en-us#troubleshooting-guide)
    - [Directory/Catalog](https://go.sitemetric.com/sitemetric-knowledge-base/forms?hsLang=en-us#directory-catalog)
    - [Reference Guide](https://go.sitemetric.com/sitemetric-knowledge-base/forms?hsLang=en-us#reference-guide)
- [Devices & Hardware](https://go.sitemetric.com/sitemetric-knowledge-base/devices-hardware?hsLang=en-us#main-content)
  
  
  
  
  
    - [SOP](https://go.sitemetric.com/sitemetric-knowledge-base/devices-hardware?hsLang=en-us#sop)
    - [Reference Guide](https://go.sitemetric.com/sitemetric-knowledge-base/devices-hardware?hsLang=en-us#reference-guide)
    - [How-To Guide](https://go.sitemetric.com/sitemetric-knowledge-base/devices-hardware?hsLang=en-us#how-to-guide)
- [Site & Campus Management](https://go.sitemetric.com/sitemetric-knowledge-base/site-campus-management?hsLang=en-us#main-content)
  
  
  
  
  
    - [Reference Guide](https://go.sitemetric.com/sitemetric-knowledge-base/site-campus-management?hsLang=en-us#reference-guide)
    - [SOP](https://go.sitemetric.com/sitemetric-knowledge-base/site-campus-management?hsLang=en-us#sop)
- [User Access & Accounts](https://go.sitemetric.com/sitemetric-knowledge-base/user-access-accounts?hsLang=en-us#main-content)
  
  
  
  
  
    - [Reference Guide](https://go.sitemetric.com/sitemetric-knowledge-base/user-access-accounts?hsLang=en-us#reference-guide)
    - [Troubleshooting Guide](https://go.sitemetric.com/sitemetric-knowledge-base/user-access-accounts?hsLang=en-us#troubleshooting-guide)
    - [SOP](https://go.sitemetric.com/sitemetric-knowledge-base/user-access-accounts?hsLang=en-us#sop)
- [App Features & Product Documentation](https://go.sitemetric.com/sitemetric-knowledge-base/app-features-product-documentation?hsLang=en-us#main-content)
  
  
  
  
  
    - [Reference Guide](https://go.sitemetric.com/sitemetric-knowledge-base/app-features-product-documentation?hsLang=en-us#reference-guide)

- Home
- Products
- Pricing
- Blog
- Company

[![](https://go.sitemetric.com/hubfs/Icon__Wordmark_-_Horizontal_-_Red-1.svg)](https://go.sitemetric.com/?hsLang=en-us)

<https://www.facebook.com/> <https://www.twitter.com/> <https://www.instagram.com/> <https://podcasts.apple.com/> [mailto:email@email.com](mailto:email@email.com)

Copyright © 2026, www.sitemetric.com