Drippy Loading Screen doesn't match monitor size

[Rebel459]

Version: 1.21.11 fabric latest. An image example is attached

[Rebel459]

the black bar is the offset, i screenshot my entire window

[Rebel459]

This is what it looks like in the editor. Nothing strange done, just a static PNG background with Preserve Background Ratio enabled, as I had on 1.21.5 prior to porting.