You might have some sort of hard transmission part on its way out
Any noise when shifting?
Spec clutches are ok, for a temporary throw away
I've seen them damage input splines and seen the rivets brake away from the discs
I replaced mine with one when it burned up, I've put about 6k miles on a spec
210mm 6 puck Kevlar stage 3 and lightened pressure plate and lightened flywheel
Lots of ass hauling mountain climbing and abusing it
I'm looking into getting an act clutch, it seems if you don't rebuild your transmission.
A little your looking for trouble, I changed my pushrod ,throw out bearing, seals ,
And more stuff
Definitely shop around and have one ready for when it goes out completely