In latest studio update, trying to rotate a brick that’s already rotated will only allow you to rotate around the basic x,y,z axis, not rotate around its own axis.
This is a single part, not a model selected so this behaivour is very wierd.
I know this someone told you how to use local space, but your original post had no question and seemed more like a hug report so I believe you should of put it in #platform-feedback:studio-bugs, just so you know for next time.