Tile selection leaves a print when scrolling

[MaximosVeLOL]

2024-10-12.10-10-58.mp4

[MaximosVeLOL]

It's pretty hard to setup, but it also happens in the tile selection on the bottom right.

[shinespeciall]

i know this problem. since it won't cause problem on data side, so it is not some severe bug.
it is like, i should use QGraphicsPixmapItem instead of QImage or QPixmap to always cleanup and update those red box, but perhaps due to laziness, or perhaps i just don't want some extra 2 files for the new derived class. so the crappy feature exists.