Theories to what this could’ve been?

For context I’m on coilovers and running a divorced setup in the rear. I was driving to work in the morning and when I got there I noticed that my passenger side suspension was way lower and the drivers side was raised more than normal (just in the rear). I do drive over some pretty rough roads going to work, I was thinking maybe the spring on the drivers side could’ve popped out of its seating while going over a bump which caused the drivers side to raise and the passenger side to lower. I checked it again after work before leaving and it was still like that, but when I got home it seemed to even out to the height it normally is. I pulled both wheels and everything looked normal. What do y’all think?