Starting roughly an hour ago, player’s characters spawn in rapidly moving backwards and phasing through much of the map… Our game is unplayable for anyone impacted. Our session length has dropped dramatically since we started seeing reports of this bug and our ccu has dropped over 80%. We haven’t updated the game in over 24 hours, so we believe a Roblox update is the cause.
here is a graph of our session length over the last 6 hours to show the impact this bug is having on us. All platforms seem to be impacted.
Attached is a video of what this looks like. It happens consistently every time they are spawned in and in every server
Here is a link to the place this is occuring in. The only difference I can think of between other games handling of the character and ours is that players in our game are locked to first person and their shoulder motors are recreated for hand viewmodels
We figured out a temporary fix & rolled it out in The Sewers, so it’s no longer reproducible in there. The cause was modifying the character’s root motor C0 in Heartbeat and resetting it in Stepped to prevent jumping weirdness that came from that. We had this code for the last 3 months to allow the player’s arms, torso, etc to appear slightly behind them in first-person, but fortunately do not need it anymore.
Here is a reproduction file of that. The only thing modified in PlayerModule is TransparencyController:IsValidPartToModify() to allow players to see their limbs in first-person CharacterMovingBackwardsBug.rbxl (183.2 KB)
