Does a new season reset your win streak?
Solution 1:
According to this PSA, no, win streaks will not carry over between seasons.
I just realized a few days ago that it's not necessarily obvious whether or not win streaks carry over between ranked months. I worked up a winstreak last night and then logged off. Just played rn and won my first match. No bonus star. I'm not that surprised, but I wasn't sure what would happen.