I rebuilt many of them.
The side that slides on out is a dummy leg, so it should do that.
Basically check the stanchions are good. So separate them from the lowers.
They are easy forks to work on, but very easy to damage the bushings and station by not keeping them serviced. Especially in rainy weather. Water sat in them kills them.
Don't buy elastomers, these use MCU's and elastomers are a step back. The way they collapse on themselves is different. Springs would be an upgrade. They had moved across to them 2/3 Years later
I've separated the stanchions and they look absolutely fine. The LH damper does have a bit of squelching going on when it is pushed in and pulled out. I've managed to get all the old bits or MCU out of the legs and all I can see by shining a light down now is a white/cream coloured plastic disc with a hole in the middle, one on each side. I've not removed the dampers yet as I've run out of daylight.