I have to assume this is Bug but it won’t let me create a topic in that category
essentially what’s happening is, the parts welded to the Tweened part are moving but the
parts attached with the HingeConstraint aren’t
I have to assume this is Bug but it won’t let me create a topic in that category
Looks like a problem with the network ownership and it appearing that it falls apart when it gets moved to the server ownership from client. Take a look at this article it may help you: Network Ownership | Documentation - Roblox Creator Hub
Good suggestion. I’d also like to add that you can toggle diagnostics that help you know who is the owner of a part.
File > Studio Settings > Physics > Are Owners Shown
Check this option.
Here what the player owns is highlighted green. What the server owns is highlighted gray.

Perhaps I messed something up but now it seems to be only server-side:
and I can’t figure out how to fix it.