Multiple pinned Copilot chats disappeared and continue disappearing

Pinned chats disappearing too is particularly frustrating, but pinning isn’t a separate backup. Support mentioning possible sync or indexing problems isn’t confirmation of a specific incident, and I can’t confirm a recovery method for this.

Since you’ve already checked the account, the next useful test is whether the missing chats appear in Copilot on the web versus the app. If they’re missing in both, that makes a local display/cache problem less likely. Also try any direct conversation links saved in your browser history; a chat might still open even if it’s absent from the history list.

Reply to the existing support case with a few examples: approximate chat titles, dates, when each disappeared, and whether it happens on both web and app. Ask whether the case can be escalated for account-specific chat-history investigation, and request an incident number if they believe it’s a known service issue. A community moderator may help route it, but the forum itself can’t restore account data.

Save copies of the important conversations that remain. Don’t clear your chat history or account data while investigating, and avoid posting private conversation links or content publicly.