I am on an android movile device, with the latets update sas of today 6.17.26. I am playing a splinter radical rat (historic?) brawl deck. I had wizard class at level 3 on the field, with splinter and yuffie kisaragi (yuriko the tiger's shadow). I hit with 2 ninjas (unblockable due to splinters activated ability), which due to splinter (doubles triggered ninja abilities) and yuffie in play, means i draw 4 cards and the opponent loses life equal to the mana value. However with the wizard class at level 3, I should have put 4 counters on a target creature. I was able to hit with 2 creatures in 2 consecutive combats (different turns), and neither time triggered any +1/+1 counters from wizard class and yuffie's draw.
Wizards class was triggering for my draw for the turn, just not for yuffie/middle of combat draws. Im not sure what exactly prevented the counters from being added, but now you know about it :)
I did win the match (understandably so, with being able to hit twice with 2 ninjas and yuffies ability that gets doubled), so ive no hard feelings. But I can see how the wizards class not working could mean the turn of the game.

This happened on my account approximately 10:45 am MST.

Good luck!

Shuablet