Clicking to select objects in the Scene view doesn’t work. I can still drag a selection box over them, and all the tools (movement, rotation, etc.) work when something is selected. I can select from the Hierarchy view. Occasionally when 1 thing is selected from the Hierarchy view I can select one object with a click once, but then it stops working again, I have closed and re-opened the Scene view multiple times. Deleted my ProjectSettings folder, and this issue has followed me between a couple versions of unity now.
It’s 2019 and I still have this issue with the newest version of Unity