Does it still pause scrolling and stop whatever's running if you click on the window or press a key? That's one big reason why I still live in a plain old DOS box. It didn't appear that the Windows terminal developers had ever heard of ctrl-s.
Has happened to me quite a few times.
Ctrl-S may or may not end up stopping the program, depending on how much it's printing, and how much output buffering there is before it blocks on writing more.
Otherwise click the top left icon, go to settings, uncheck QuickEdit.