Toolbox sent to start / Toolbox position resetting upon Play

As stated here in this forum: Pressing Play keeps moving the toolbox to the left and jittering Studio UI - #2 by Krektonix_Youtube

Every time I press play, the toolbox keeps getting sent to the first place.

Proof: https://gyazo.com/bc514d0e19829cf163db727d0ddc3641

How do I fix this from happening?