VR PIE output no longer resizes when window is scaled.
Confirmed with Rift and Vive
Confirmed in 4.25 MAIN @ CL 11196267
4.23 Result: project output resizes to fill window
4.24 Result: output remains the same size
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-87944 in the post.