Regarding Background and other elements can get out of proportion/position after alt+tab'ing out and back in posted here aswell as here.
After having a chat with BeatBreakerS it seems that there's a few requirements to replicate this:
-Raw Input has to be enabled.
-Parallax has to be enabled.
-osu! has to be running in dedicated fullscreen, even in the main menu.
-You must use a device with absolute positioning (such as a tablet).
Once those requirements are met you can replicate it by doing the following:
-Move your cursor around on the main menu with your tablet.
-ALT+TAB out of osu! and do whatever, just move the cursor around a bit.
-ALT+TAB back in.
I guess that this is caused by osu! being unable to apply the parallax transformations while its minimized due to running in dedicated fullscreen, upon maximizing it again you get this messed up transformation.
(Huge thanks to BeatBreakerS!)
After having a chat with BeatBreakerS it seems that there's a few requirements to replicate this:
-Raw Input has to be enabled.
-Parallax has to be enabled.
-osu! has to be running in dedicated fullscreen, even in the main menu.
-You must use a device with absolute positioning (such as a tablet).
Once those requirements are met you can replicate it by doing the following:
-Move your cursor around on the main menu with your tablet.
-ALT+TAB out of osu! and do whatever, just move the cursor around a bit.
-ALT+TAB back in.
I guess that this is caused by osu! being unable to apply the parallax transformations while its minimized due to running in dedicated fullscreen, upon maximizing it again you get this messed up transformation.
(Huge thanks to BeatBreakerS!)