This has been happening for a while I think, not sure.
Almost always when I draw I don't get a score button. In the linked replay below I asked my opponent ingame and he didn't get a score button either. I also think I often get this in teamgames.
Draws being unranked also happens a lot too:
I think these are all known issues having to do with the bugginess of the score reporting
FWIW, I find PhantomX is the worst offender. We get scores in most of our multiplayer custom games, but Phantom is almost guaranteed not to give us one. (Tho when I watch the phantom replay, you get one.)