Hi @adrievx ! thanks for confirming this is happening inside a Project and that your connection is stable.
There’s a known issue with some Project conversations where branching can make parts of the chat history look like they’re missing. This may be related, although your case is a little different since the history comes back after a refresh.
If it keeps happening, please open a private Support request at support@openai.com and include the affected account email, conversation ID, plan, model, plus any error messages or other details you noticed.
Please don’t share any private account or conversation details here in the forum.
-Basil