Severe Performance degradation when the studio explorer is open with multiple objects in it

to start off i cant post bug reports, which is why I’m using this tag instead.
I’ve provided a video below, but.
Whenever i open the explorer window and say open workspace which has a high children count, studio starts being very… very… slow.
With only 250 parts in workspace and none of them grouped, studio starts lagging so bad that frames can dip as low as 5 fps. this makes working within studio impossible.
I’ve already tried reinstalling studio with no luck.

if anyone has any idea about what could be causing this id appreciate it.

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Also experiencing this issue. It seems to be related to a huge Thread according to the profiler
image

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Update : the issue seems to have resolved itself on its own, I have no idea why this has happened though.