For larger files and with cpu struggling, drawing a small line can sometimes trigger the app to draw huge lines like this. Normally I'd let it do it's thing, do the healing, then undo. But if you make one tiny mistake of clicking elsewhere on the app, it'll stop responding and be forced close the app.
I'm working with 50 files today and still encountering this issue a dozen times already, I used to tolerate it but enough is enough so I'm posting this now. What can be done about this? Is this a known issue?