Rotation gizmo for some reason chose wrong axes.
For example, you can’t rotate object in 2D view.
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Does this happen with a new project? As Peter said, a bug report would be much appreciated.
Yes, the same thing happens in totally blank project (Created using 2019.3.0b3)
If I remember correctly I didn’t submit it before due to some problems with “not strong enough submit”,I will try doing it again
Please update to a recent 2019.3 version. This issue has been fixed since b5.