Cannot put tags but from what I see the tag should be "Mod issue".
Also I have wings so I can't tell if you have the wing effect when being an Ender Dragon.

flying is turnt off for Identity.

Pretty sure wings wont apply the effect on top of Identity.. It kinda should but I don't think it does.

Uhhh Flying works with Identity, you can fly as a bat for example. Well it works on the server i'm on at least.