I'm gonna keep trying to post all the bugs I find but usally they are quite random and then it's quite hard to guide you to the problem.
I have history activated for camera movement. FYI. (probably not relevant)
If I move one pin in a HDRI. One movement, It's recorded as one movement Ind if i CTRL+Z it jumps back with one click.
If I have two pins selected and do the same. It records the movement ...maybe 10 times. a long the path i moved the pins. So I need to press CTRL+Z 10 times to get back to where it was.