yeah I had that issue too, but I figured most people would max tama so it wouldn't matter, pretty easy fix to just add dark outlines for tamas missing evo tho
I randomly found the middle mabu evolution unlocked somewhere but not the others, I hatched a mudgill in the warm light event trying to get nessa and evolved it when it wasn't nessa, but this unlocked the second mabu in the compendium, and not the first or third forms.