If you have automatic screenshots enabled for level ups, and have the skill menu open when you get the level, the old level will be shown.
For example, below, I achieved 4 woodcutting, but the screenshot that was automatically created by RSC+ shows 3 woodcutting.
Logg said this is an issue with RSC+ and not the server: https://gitlab.com/openrsc/openrsc/-/merge_requests/3948#note_2123517975.
Can anyone point me to where in the RSC+ codebase this logic for creating screenshots when leveling up is? I can take a stab at it.