[2019] Mastery tree not unlocking

@rfh:

it looks like if you get all 25 orbs before you play with a different colour deck, you can no longer unlock the coloured orbs, even if you play with a different coloured deck.

Yeah, we have this in our backlog to fix. There's a workaround - if you log out and back in from the options menu, it will let you spend the orbs once you've played with the relevant deck.