cause do a barrel roll to work funky with a elytra, your screen will not move properly and it makes flying on elytras almost impossible.

Will need a video

I'm experiencing the same issue, the camera barrel rotation of the "Do a Barrel Roll" mod is completely disabled when using the "Gliders" mod.

The camera is supposed to do the barrel camera rotation alongside the player model, but with gliders installed it stops working, as seen bellow:

In my case I'm using Minecraft 1.21.1, Fabric Loader 0.16.14, Fabric API 0.116.4, Do a Barrel Roll and Gliders (Each with their respective Dependencies).

Extra Info: By using the mod Shoulder Surfing Reloaded this issue gets fixed, but only for the Shoulder Surfing perspective, the default 3 remain broken.