@chrisoffner3d I have this (process taking up a lot of CPU) happen with some file manager/browser apps once in a while. Generally, killing the process and re-launching seems to fix it. So I assumed that each time that there was a deadlock for a file or something …
But if “bird” does this often, then that would be concerning. Do you by chance have something like anti-virus installed which might be stalling file access? That might be something to investigate if you want to identify the culprit?
The other possible thing to try is to turn off iCloud access on a per-app basis via Settings and see if turning off a particular app fixes the issue.
If you can identify the culprit, then you can at least let the developer know and see if perhaps they can fix the issue, right?