UPDATE: Just replied to everyone here since my last “PM sent” message. I think from now on, please PM me instead of posting on here. I still get emails on PMs but not for Subscriptions on topics anymore, no idea why.
Also tested the first BD disc on a PS4 Pro and Xbox Series X. Series X plays it just fine and PS4 is glitchy just like PS5, so god knows what’s up with the player (or encoder?) on PS4/PS5. Don’t have a standalone BD player on hand to try it out on so I can’t confirm on that.