Bazel not rebuilding when a file changes.

[Chet Gnegy]

I'm running bazel 9.1.0 on OSX and my c++ build often just uses the build cache and doesn't recompile even though a file has changed (my finder updates the Last Changed date on the file). Seems like it mostly happens when it's a header change, but I think I've seen exceptions. What is going wrong here?

Thanks,

Chet