Dress Down doesn't stop the triggered ability of Sun Titan. Steps are:
1. Opponent casts Sun Titan
2. Cast Dress Down in response to Sun Titan
3. Opponent lets Dress Down resolve; let Sun Titan resolve
4. Actual: Sun Titan's ability triggers targeting the only valid target in opponent's graveyard
5. Expected: Sun Titan's ability doesn't trigger, as Dress Down removes it.

In two seperate games, Archpelagore wont let me target with his mutate trigger. Steps are:
1. Mutate with or on Archipelagore
2. When the trigger goes on the stack, it say there are no valid targets, even when opponents have creatures
3. Actual: Trigger goes on the stack with no target
4. Expected : Should let me target my opponents creatures to tap them

Seven-Tail Mentor's ability went into the stack but didn't let me continue after choosing.
oddly there's a plus one counter in the cemetery.

I controlled Dress Down and cast an Uro. His draw ability triggered, but his Sacrifice ability didn't (how it should be).

While playing a league game an opponent casted march wretched sorrow on my Liliana of the Veil and not only it did not kill it, aftewards it was not possible to kill even when opponent used Lightning bolt or attacked directly with Voidwalker.

1. Opponent attacks Teferi, Time Raveler
2. Loyalty points did not decrease

Etching of Kumano exiled planeswalker when it reached zero loyalty, but it shouldn't have.

Blocked a creature with an animated expedition map. Client wouldn't let me activate the map to search after blockers were declared.

MTGO says "Tangle Wire" is not legal in Legacy

Blastoderm is bugged - fade counters dont work

Tangle Wire: Fade Counters are not removed in Upkeep.

1. Cast March of Otherworldly Light with X = 0 targeting an animated Inkmoth Nexus.
2. The opponent activates the ability of Spellskite targeting the March on the stack.
3. Actual: March is redirected to Spellskite and nothing is exiled.
4. Expected: Spellskite's ability resolves but doesn't change March's target because Spellskite isn't a legal target for March with X = 0. Inkmoth Nexus is exiled when March resolves.

Seen on https://youtu.be/E7U-756CSdE?t=1073 (at 17:53).

Fading is not triggered, all fading cards do not actually fade. This includes Parallax Wave, Tide, Tangle Wire, Blastoderm.

Ixidron does not properly work with Devotion Gods, nor double faced cards.

During an EDH game I played Ixidron didn't properly interact with Cosmia, God of the Voyage, it turned it face down, even though it is a double faced card and shouldn't have been turned face down.

Additionally It failed to turn Thassa, Deep-Dwelling face down while it was a creature, presumably because the cards providing the needed devotion were also being turned face down, but since this was all happening simultaneously, Thassa should've been turned face down as well.

Parallax Wave fading doesnt work, the enchantment is permanent

Trigger 'Nashi, Moon Sage's Scion' hitting 2 copies of the same card.

I am unable to equip equipment cards to Slippery Bogle. It has Hexproof not Shroud. Is this a bug?

Nihilith was uncastable after having the last suspend counter removed.

Expected:
Suspend 7— 1 black mana - (Rather than cast this card from your hand, you may pay 1 black mana and exile it with seven time counters on it. At the beginning of your upkeep, remove a time counter. When the last counter is removed, cast it without paying its mana cost. It has haste.)

Fury's enter the battlefield ability did not affect one of two targets when the other was flickered. Steps are:

1. Cast Fury for 3RR
2. Target a Knight of Autumn with no counters and a Birds of Paradise for 2 damage each with the ability.
3. Opponent casts Ephemerate on the Birds of Paradise.
4. Let Fury's ability resolve.
5. Actual: All creatures take no damage.
6. Expected: Knight of Autumn takes 2 damage and is destroyed.

I have a screenshot of the event, but am unable to attach it due to an error. The event occurred in match 247830474, game 794485988 on my turn 4.