Don't worry about user error or clipping, that is for the most part nonsense IMO..
Tinsel lead is inherently problematic; a portion of the lead may have excessive flex which weakens the strands of aluminum and creates an area of high resistance.. from there the lead will either brake or burn off..
You should be able to solder the lead back on at the cone, afterwords coat the solder joint with epoxy and you should be good to go.. or if you are more ambitious you can pull the dustcap and dig out the old lead to solder in a new one..