It looks like after 3 more minutes of testing, it's a me problem. There is one particular file that goes bonkers, which just so happened to be the one I had up. If I start a new file in that project, or work on an existing file in a different project it's fine and the completion works as expected.

I can't make it work with the one file, but yeah...not a codeium problem at all. I'll be sure to test at least 5 minutes next time ;)