Part glitching through part despite welded

I am trying to make a hovering drone. As you can see it got the respected instances shown in the picture :
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I welded all the other instances in the same model to the primary part using the Edit Rig plugin.
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But I am having this issue as the part just clips through the primary part when I run the game.
This is the asset I want it to hover. This is the picture before testing the game:
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and this is how the asset becomes when I test the game:
image
I have anchored only the primary part for the tween to work. Rest all are anchored to false. The CanCollide is also false for all the instances in the model.
This is the script :


I checked similar topics related to this issue but I didnt get the solution I wanted. I may be missing something silly here. A thousand apologies if this type of problem is already solved. If not, Kindly help me out in this matter. Thank you

Nevermind, I figured it out myself. Turns out it was a studio bug. Closing and reopening the studio seems to have fixed the problem.