Yeah, giving the paddle hitstop frames was an attempt to fix that, and it only worked in like 80% of the cases. But it gives you more points, so I'll say it's fine lol
This is the first I'm hearing about it and I can't replicate it myself, so I'm intrigued by how that's happening! Are you perhaps not using a QWERTY keyboard?
I tried to fix that corner multiple times and I think I only made it easier in the end, lol. At this point I'll probably just make it an intended feature and have the balls eventually expire if they stay there too long