In latest version on Android, when my opponent has a trap card/ability used, I cannot see the outline on the gems. Matching becomes Russian Roulette where I don’t know if I will deal 2dmg to all my creatures, or drain myself of mana
This is the point of traps. 
Ah… I feel like I used to be able to see them. Maybe that was a corrected bug?
The bug is that IA knows exactly where are the traps that yiu play with priest of the blood rite, always makes a 3 with then but they are traps and the IA shuoldnt see that
you can always see your own traps, not the opponents, maybe thats why u think you used to be able to see them.
and yes it seems to me that they always trigger traps when playing priest. but i think the reason is that the ai opponent was coded to try and trigger black match gems when the player has a priest on the board. maybe maybe not