Local physics simulation (Which as I recall is supposed to locally simulates objects controlled by another player and interpolate any misalignments), currently works very poorly. Previously if you had a part controlled by another player and moved against it, you would be able to move it around pretty smoothly. Now it has a very jittery/glitchy behaviour like this example:
Same thing happens when just pushing your character against the part in the video, which can be tried in the repro below. As far as I know this behaviour is the same in every game and it happens in both studio and live games.
In addition to that the physics simulation doesn’t work at all when a humanoid is involved in the assembly, such as a player sitting in a car. Here you can see the difference between a car with a player getting crashed into vs without the character: https://youtu.be/FBc5lw7FLuY
The latter has happened every since this feature was implemented as far as I know, the first did not happen at first but I can’t tie it to a specific date because the humanoid bug has been causing local physics simulation to almost never be applied in my main game Car Crushers 2
This place can reproduce the bugs in the videos: VehicleRepro.rbxl (111.0 KB)
- Start a 2 player server
- Drive the red car as player2 and try crashing into the part or blue car