Wrong palettes when loading connected map

[mertens2]

For some reason, whenever I enter a map connected to a previous one, and sometimes when object events leave the camera, they appear with wrong palettes. Opening and closing a menu solves the issue, though.

Happens with the player character as well, but only when passing from one map to another. Going back to the previous map will cause almost all palettes to be messed up as well, and the player seems to take the palette of the first loaded object event.

Again, opening and closing a menu solves the issue.

I've tried solving this issue on my own, but I just don't find where the problem lies.