It seems like whenever there is a player in the server (or near my model), it gets all these weird offsets with the parts that weren’t there originally. I think this might be a network ownership issue, but I’m not sure. Is it how I’m welding the model?
Extremely oddly, this only seems to happen in one place. When I copy/paste it into another one, this behavior doesn’t occur.
Before a player joins/gets near it:
After:
Could another script in that place be interfering?
I thought so. Haven’t found anything yet
Does the car move a bit when you spawn in before you go inside?
Try anchoring everything before you weld it.
Go through each of your scripts and disable then until you find the problem. Also, try anchoring the parts before you weld them. Then you can unanchor them.
I agree with above and to make things easier you can start by disabling all your scripts first to see if that’s even the problem
They are anchored…
Weirdly, they are anchored. I’ll try disabling the scripts tho 
Great, let me know if that works out.
Try setting the network ownership of the car to nil to avoid nearby characters being transferred ownership automatically and check if it works.
Already tried that! Same results. Very weird.
Are you using SetPrimaryPartCFrame()? Sometimes that causes inaccurate offsets.
Since setting network ownership to manual doesn’t work, you could try using WeldConstraints as opposed to using ManualWelds (or vice versa if you’re already using WeldConstraints). If this fixes your issue, that could indicate that something is wrong with Roblox’s welding system.
It’s using WeldConstraints. Might be that.
That’s strange. Never had a problem like this with WeldConstraints.
Things have gotten weirder. It only appears messed up on the client. The server still sees it fine:
Client:
Server:
I’m pretty sure this is a Roblox glitch now.
Do you have any localScripts? Try disabling them maybe?
Sorry for the late reply… There seems to be no local script that could interfere with this 
Are you sure? Did you check character scripts as well? And this is only client-sided?
