I’m only aware of a bug I reported time ago, and have received no feedback if it was fixed:
[UE5.2.1, Bug report] Controller::Possess broken if Pawn auto possess AI.
From your description it can be anything. Only the actual code can be debugged. Things that would help are the affected engine version and screenshots (or code blocks) of your setup.
So the pawn object receives the input? And are you using experimental plugins like Enhanced Input?
ChatGPT can’t do a simple list deduplication