Do you have handlebar bag ? Is it hitting your tether a bit when u have it cranked ? Running pro taper bars ? You may have slightly bent your bars which will cause the bag to hit the tether if your running the low ones.
Go to mag tether they’re better and seem to work better with electrical on these sleds. Jumper out the throttle safety switch too they mess up when the sled is laid over, $40 easy fix.
Bad TSS will cut out electrical and fuel at strange times, bad tether connection will do all the same.