Problems with smoothing.

[[Unknown]]

The problem is that the game starts changing the texture frequently (e.g. while you scroll or something.) When PPSSPP notices it doing this, it realizes that it can't keep processing the texture that often or it will give you ~2 FPS or something. So, it simply gives up and stops.

Possibly, it could try again sooner, but it's hard to get this right in a way that doesn't give ridiculously bad performance in some game or another.

Ultimately you have to pick one of these:
* Accept that sometimes graphics won't be scaled.
* Accept that sometimes you'll get unplayable FPS unless you use _very_ powerful computer and use conservative scaling settings.
* Accept that sometimes graphics won't update (especially e.g. panning/scrolling), but will at least always be scaled.

We've picked the first one.

-[Unknown]