Tony 9.02, 9.2 or whatever it is the latest version on SteamVR has the playback issues; 8.3, the older version I downloaded does not. Something must have changed in the player to cause this because 8.3 works fine (the intermediate version I used before that also worked fine. there only seems to be a problem with this new version)
I can only speculate on causes (like maybe difference in version of one of the files in plugins dir is causing it) but don't have the technical know how to really troubleshoot