This forum is fellow users. I can only sympathize and get similarly annoyed when experiencing undesired behavior changes.
For tasks where you know the memory will be unreliable or unpredictable, you can compose your entire question, including all documentation or prior useful responses, into a new question ( often easier with an accompanying text editor). A question of similar quality as if you were putting it into a brand new conversation. Then paste.
(pro tip: shift-enter lets you type new lines instead of sending, so you can make more structured queries to the AI)