Yes, tearing is gone, BUT in Unreal Engine tradition, with every fix, new bugs come.
Previous bug in all versions (4.22-4.25): MobileHDR off -> AR camera footage is too dark and too much contrast. Brightness levels are crushed in dark and bright areas. So MobileHDR had to be turned on: Unreal Engine Issues and Bug Tracker (UE-90099)
This problem is even in screenshots of the documentation, for crying out loud! I am baffled some people think this terrible image with wrong contrast would be normal.
See images at the bottom: Augmented Reality Quick Start | Unreal Engine Documentation so embarrassing…
Now in UE4.25preview1&2, with MobileHDR ON the camera image is too bright. This is a joke!
Might be someone not understanding the problem is dynamic range and mobileHDR, so just boosted brightness,
ruining the footage for everyone with MobileHDR on. 
They should fix it or deprecate, not wasting our time.
i am moving all projects to Unity or RealityComposer. Sorry, but this got ridiculous…
Good luck with your projects, pals!