basically just the title. it forces u to redo the entire challenge. its one of the worst challenges because of how repetitive it is, and having to redo the entire thing is not fun.
before someone say "just let a tank get the crystal", in partyfinder your words mean nothing, players dont care or they dont speak english (and only 10%~ ish of the players that care) or they are new, so saying "let a tank take it" in party chat means nothing most of the time. also some parties dont have a tank
and u cant say that "even a glass cannon can tank that room", its partyfinder, not all players are skilled and thats okay.
my suggestion to this feedback is to just not reset the challenge and spawn the crystal in the current floor of that challenge.
sorry for the yap my raid took 16 minutes to complete because of that room (and also because everyone else died in boss)