When Screen Animations is off, the New Bed Screen will have a different background overlay, this is not the case on the old bed screen and other screens.
Step to Reproduce:
Enable New Bed Screen (Experimental) and turn off Screen Animations
Enter any world and go to sleep
Turn on Screen Animations and compare to when Screen Animations was off
Expected Result:
The screen background is darker, just like the old bed screen
Observed Result:
The screen background is less darker