Sometimes I have forgotten to close the 'run' window (In mitigation, I plead that it is hidden behind the main window) before closing CB down.
After some hangs, and losing workspace info, I have realised that asnwering 'yes' to this results in the 'hang'. The pointer turns into an hourglass and the screen goes greyed, and if eventually I press the exit cross, it bombs out complaining to Microsoft :-(
Answering no, and closing the 'Run' window properly as one should, and then shutdown works OK.
My recollection that negligent behaviour like this was handled OK before.
Know feature?
CB 20.03 on Windows 10, all compilers?