Unity, clicked something, now if I want to select an object?

Question

Unity

Unity, I clicked something, now if I want to select an object, the last object is selected first, then the previous one, then the one I clicked on. That is, you need to click on the object 3 times to select it, restarting the unit does not work. Works like ctrl + z and ctrl + y toggle selected objects back and forth.

Answer 1

Very similar to double nesting a prefab. Are objects also selected at the root of the scene?