That sucks. I have self landed my RRD at bare minimum 50 times, probably more like 150.
Never close to a problem (as in bladder leak or pin hole or anything in LE), let alone shredding the LE.
I've done at least a thousand self landings though, so I have it fairly dialed by now and the landings are very soft.

I have noticed using a front line for self landings provides a MUCH softer as well as controlled landing than using a rear line.
Most kites require some sort of mod to the bar to use this technique though.
That's too bad. What kite was that?