[edited] This post was similar problem to Solved post and same cause. Please refer the post!
When try to open multiple Roblozx Studio from [Open From Roblox], it just happen nothing.
So currently I cannnot go directly studio dashboarf from it, using flow like [New] → [Close] → deny save → [Dashboard].
You should check whether the bug you are going to report has already been reported before, to avoid duplicates. This bug has already been reported several times before, and has already received a staff response: