Cura on Windows 10 Not Responding

In general, Cura runs fine on Windows 10 and I don’t have any problems. But during a long print, when I have to change the filament, on several different occasions, I click on Pause, and it doesn’t pause, I just get the message “Not Responding” and the printer just keeps going.

And I’ve managed to change the filament on the fly when this happens, by simply pushing the new filament into the head as the end of the first reel disappears into the head.

But if anyone knows what the issue is and has a fix, please let me know.