Chat didn't save or isn't showing

One chat being used between 09/04 and 09/05 did not save. I saw “memory updated” multiple times but nothing appears in the Memory section about the topics, either. I was in my correct account and did not have it set to temporary chats, everything was as usual. Is there any chance this is a bug that happened around that time and will be corrected at some point or am I completely out of luck?

This is of course the one chat I really needed.