ChatGPT o1 Pro Crashes (no matter what I do.)

Hey,

I am working with O1Pro on an app with about 20 files (1500 lines of code.) It is no longer replying (usually says " Request for o1 pro mode

Finished thinking".) Occasionally I can get it to.
What might be going on under the hood? I feel like I broke it somehow (not sure what to avoid in the future.)

Also I could use a strategy to work with it on large files efficiently

(ideal case is that it pulls in its objectives, next steps, and the code base each time but it is a lot of clicks for me.)