To recreate this bug, use this object file listed below and right click and then click negate. Every time I click negate this happens. union.rbxm (17.5 KB)
I am using the latest version of Roblox Studio on Windows 10.
As per our engineers: This issue was fixed March 17th. This issue should now be resolved! If this issue is still occurring, please create a new topic for us to look into.