Add warning message when releasing all Sync buffers while still in use

3 jobs for fix_buffer_sync in 29 minutes and 6 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #49430
linux
build-linux

00:18:37

passed #49431
win
build-win

00:28:43

 
  Deploy
passed #49432
conda linux allowed to fail manual
deploy-devel

00:00:22