Some kind of issue with filtering. (A delay?)

[[Unknown]]

Most people aren't using supercomputers to play PPSSPP. It turns out that rescaling graphics every frame would make many/most/possibly all games unplayably slow on anything but fututuristic supercomputers.

For this reason, PPSSPP checks for textures that change frequently - when they do, it doesn't rescale that texture every frame. This way, you can play the game at full speed even on only an expensive gaming PC, and don't need to spend a million dollars on a supercomputer.

The reason it starts scaling it again after a couple seconds is that it notices the texture stops changing. Therefore, it looks safe to scale again.

In this particular case, the changes are probably related to the way the game animates the character sprite's movement. Checking "Retain changed textures (sometimes slower)" in the settings may allow it to cache all the different frames of the animation, and keep them scaled.

-[Unknown]