I use sublime on my macbook running Catalina V10.15.3. When I connect it to an external monitor and move Sublime to be displayed on the external monitor the pop-ups continue to appear on the integrated monitor.
So for example when I try to open a file, or try to close a file with unsaved work Sublime will appear to ‘freeze’ until I find the pop-up in the other monitor. This can sometimes be difficult to notice if there are other windows open in the other desktop.
Is this a known issue?