When playing, player played a 3rd card for 6 points but also landed on 31. How many points would they get? 6? 7? 8?
6 points for the third card of same rank.
2 points for finishing at 31.
8 points total.
Wikipedia Rules of cribbage says
If a card completes more than one scoring combination, then all combinations are scored.
Card combinations cannot span a reset.
They can, though, complete the sequence.