Probuilder issues

Hello. I already posted a question about probuilder, but nobody answered. I am starting to doubt if this tool is in use nowadays.
If anybody knows how to use probuilder, please tell me, how to fix this? As you see in image, the selection icons changed into wrong way, and I can't see which icon is pressed now. It happened itself, without anything from my side. I just opened the scene 2nd time and noticed that the icons are changed.
And also a question. Why I can't copy an object? I press ctrl+C, but it can't be copied anymore. I still can copy object in another project, but ctrl+C doesn't work in newly created project. I can copy objects only by right click from hierarchy, which is inconvenient.
Version 3.10.1

 

Of course, nobody will answer.