My Xperia 5 is currently on 55.1.A3.112 (A10 - March security patch)
DRM Content Playback has been semi fixed. Netflix doesn't stutter for a few minutes but the video will stop (audio continues perfectly fine).
Prime video seems to be 100% perfect now with 1080p HDR content.
GPM/YouTube Films exhibit extreme stuttering.
Disney+ seems to be a bit like Netflix but if you skip 10s, it seems to temporarily fix itself.
So video frame skipping still exists on most streaming platforms and it's beyond the absolute joke.
