Welded Meshparts cause Player Rig to stutter

Hello, I am working on an SCP: Containment Breach recreation, however I ran into a problem that just recently started today for no reason after both studio and the client updated.

I am trying to fix whatever ROBLOX could have changed in order to break my custom character. I play-tested the game after the update, and realized my player would NEVER move, it was the equivalent of high ping on a Minecraft server, rubber-banding every second. I tried it in-game as well.

This persists until I delete the Items folder, which has all of the items the player can pick up throughout the game, so that when they select the item their character holds the respective item. These items are welded to the player using a WeldConstraint between an attachment and a bone.

With Items:
RobloxStudioBeta_XXZOjVrKKR

Without Items:
RobloxStudioBeta_l9s4V4jxlj

Once again, this worked flawlessly until today (never touched it at all). I have tried searching the DevForum for the past 10 minutes trying to find a working solution, but still no luck, any help will be greatly appreciated!

I also didn’t know whether it really is a bug or not so I put it here to be safe.

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Have you tried disabling collision of the items?

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The collisions are disabled, they are set to Massless, and are not anchored.

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Odd. To me it looks like hipheight but I doubt the items would affect it. Maybe try adjusting it to see if something changes?

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No luck. Still does not work the way it did prior to the ROBLOX update.

Yeah its sounding like an engine issue, id put in a bug report or something

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I can’t really file a bug report (not even a Feature Request), I don’t know if it’s from me not doing too much on the DevForum or what

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Are there any Constraints or Movers or a Humanoid in the welded MeshParts?
Maybe something that you accidentally added like an AlignPosition that keeps the MeshPart in that position?

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Only the WeldConstraints are present in the item meshes.

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In Studio when you test go to your Models tab and in the Constraints section select Show Welds. Welds appear as green lines between the Unanchored welded Parts, and grey lines between Anchored and Unanchored Parts.
This will show you if you are welding the items to the baseplate or some other object.

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Items are not welded to any other part, the rig will not work right until the welds are completely removed from the character.

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Do you have anything that is causing the MeshParts to stay in a CFramed Position?

When testing try going into the Explorer window and clicking on your Avatar in the Workspace (not the Players folder). Find the MeshPart welds and start deleting them one at a time to see if only one of the welded MeshParts is causing the issue. It may just give you a better clue of what’s going on.

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I have the same issue. Everything worked perfectly until the most recent Studio update. Very irritating. So far no luck in finding a solution for it. I also noticed the Camera to Animate UI showed up on Studio upon testing locally. Perhaps this has something to do with it?

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Already tried this, rig refuses until all welds are completely gone. No changes, no errors, it’s just something that started after ROBLOX’s recent update.

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If you can file a bug report. If not I think you can DM @Bug-Support.

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Are you parenting all the objects to the character? Because that may fix it, otherwise.

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They are parented to the character

In ROBLOX’s recent updates, they have patched this bug I believe, as it works fine out of nowhere again.

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