The card breathless knight did not have it's ability trigger when any creatures returned to the battlefield from the graveyard. This happened with multiple spells and multiple times.

Expected: Whenever Breathless Knight or another creature enters the battlefield under your control, if that creature entered from a graveyard or you cast it from a graveyard, put a +1/+1 counter on Breathless Knight.

I put a Winota into play by playing Eldritch Evolution on Esika's Chariot. Then, I attacked with some non-Human creatures, put Brutal Cathar (Creature — Human Soldier Werewolf) into play and exiled a token. Then, they blocked the Brutal Cathar and it died. Winota is supposed to give the Brutal Cathar indestructible. This is a major problem for me in this event (this was round one) if Winota is bugged to not give indestructible.

Had an issue come up in this match where dress down didnt make my opponents creature lose flying

Whilst fiery confluence is on the stack, neither the card nor game log indicates what modes have been selected.

Tokens generated by god-pharoah's gift are affected by summoning sickness since last MTGO update.

Pia's Revolution "Whenever a nontoken artifact is put into your graveyard from the battlefield, return that card to your hand unless target opponent has Pia's Revolution deal 3 damage to them."

1. Opponent chooses to give it back to your hand. -THIS WORKS.
2. Opponent chooses to keep it in graveyard. They take 0 damage.

Problem: They are supposed to take 3.

And I do understand, that the card can't be exiled or removed during this process, and that is not the case. I've tested it several times today and 0 damage is always the output :D

Step 1: Casting Spells and resolves
Step 2: Cards will be revealed.
Step 3: All cards are shown in the temporary zone.

Issue and Step 4: The only card you can order once any of the two spells get resolves is the first one, so THE PROBLEM is you can't order the cards that were revealed in the order you want back into the library.

Parallax Wave fading doesnt work, the enchantment is permanent

When sacrificing permanents i did not draw any cards eventhough there was nothing to prevent me from drawing cards. That happend now both times i played god-eternal bontu. So 100 percentof games i played the card.

Ozolith does not trigger when Terminus is played (at least from miracle).

Attack with Hunter Sliver and/or other Slivers with Provoke, the provoke trigger is not working.

Actual: It doesn’t trigger provoke
Expected: They should all have Provoke

Yet another opponent crashing the game in a limited match due to playing tons of class cards

Regent's Authority doesn't add the +1/+1 counter

It was cast during combat on a legendary creature.
The creature gained +2/+2 but not +1/+1 and a +1/+1 counter

He played a spell.
I tried to counter that spell with Lofty Denial.
He pay only 1 mana and the spell resolves. I had two creatures with flying in play.

Abandoned Sarcophagus exiles cards when you cycle them, instead of letting them go to the yard. It specifically says they go to the yard if cycled.

lavinia, azorius renegade preventing the casting of spells. I had 1 Island and couldn't cast Ancestral recall

Morag, Fury of Akrom not working properly. My opponent played a land during their first main phases, but got their additional combat where they untap after their second main phase.

1. Massacre Wurm death triggers do not cause loss of life.
2. Opponent(s) loss of 2 life trigger(s) are put on the stack appropriately.
3. ACTUAL: Trigger(s) resolve without opponent(s) losing any life.
4. EXPECTED: Trigger(s) resolve with opponent(s) losing 2 life per trigger.

I cast Tamiyo's Compleation and targeted The Wanderer
Even though I can target a Planeswalker with it, it crashed MTGO
I keep logging in and it keeps booting me, I'm stuck