I haven't got much of a repro. I have ibazel run //some:target or ibazel build //some:target going, and it works for a while and eventually stops. I have fallen back to my earlier general purpose watching tool, but would like to be able to advise colleagues to use ibazel as it matures.

Is this a familiar issue to anyone?

Seen with ibazel built from commit 15a1ebd on Linux:

$ lsb_release --description                                               
Description:    Debian GNU/Linux testing (buster)   
$ uname -r           
4.11.0-1-amd64