Bug: File attachments removed when switching models during use
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Description
Bug Report
Issue: On chat.z.ai, when users submit a prompt with a file attachment and then request a model change (e.g., GLM-5.2 to GLM-5-Turbo), the file attachment disappears, requiring the user to re‑attach it.
Environment: chat.z.ai (free platform)
Reproducible: Yes - simply send a prompt with attached file, request model change, attachment vanishes.
Impact: Wastes user time, may lose context, reduces productivity.
Reference: This bug was originally reported on Discord at https://discordapp.com/channels/1346756824233148527/1531108874881601706
Reporter: 9dx25
Date: 2026-07-27
Additional Info: This behavior disrupts workflow by forcing re‑attachment of context when switching models during peak hours.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The report names no repository files, tests, or entry points. Reproduce the attachment and model-switch sequence on chat.z.ai, then locate the responsible flow and define coverage showing that the attachment remains available after a model change.
Written by the indexing model from the issue text.
Assessment
- Domain
- web-dev
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100