Every match in the duel log says my opponent was level MAX but at the beginning of the duel it says they are lvl 19 like me and no gold banner that’s says “win to level up”. So is this a bug, or is 19 really the max level right now?
Their MMR is lv 19. You can't be demoted from DLvMax, but your MMR will go down.
Theres a higher pool of LVL MAX players than LVL 19s so youre getting matched to them. No big difference really, just keep winning and you'll get there.