I know lately some members discourage users to post a 'me too' kind of post to issues, BUT the way support works here, the more that report the same issue, the better your chance of getting it fixed.
So YES me too, I see it too with new movies or shows. Just from approximately from the last few days.
Of course, older content that's been on Peacock work fine at full 1080p.
And if anything like last time, (the last DRM mess) this is only the beginning, sadly.