I had on the board an "Alseid of Life's Bounty" and an "Ajani's Pridemate".
The opponent attacked me and I blocked with "Ajani's Pridemate". Before damage, I used Alseid's ability to give my Pridemate protection from the color of the attacking creature.
Even with protection, my creature suffered damage and died, while Protection is supposed to prevent any damage caused from sources of that color.
No screenshot was taken because I didn't have enough time to do it.

Game is not saving new decks.

When you click in complete, nothing happens.

The Gitrog Monster is currently not legal in BO3 Historic, but is legal in Brawl, BO1 Historic, and the play queue

When you try to counter a spell Sparky casts with Thassa's Intervention with twice X being greater than the amount of mana Sparky has, he taps all lands to try paying for the counter, then sort of realizes he doesn't have enough to pay, then untaps all lands and tries again, causing him to be stuck in an infinite loop

My opponent had an enchanted Siona. It was power 3. I used Entrancing Lyre with x = 3 to tap it. The lyre goes on the stack and remains there without tapping the creature. I see the stack with the lyre on x = 3 for the entire game

Every time I click on Change Pet in the Profile window, the game freezes. I can't change my pet.

After updating today (2020-1-16) opening the game always results in a black screen with only the cursor visible. This still happens after fresh install

Steps to reproduce:
- Uninstall MTG Arena
- Download Installer from https://magic.wizards.com/en/content/mtg-arena-download
- Run Installer and wait for install to be finished

Observed behavior:
- After install completes, Arena opens but only displays a black screen and cursor. Nothing else is visible

Expected behavior:
- After install completes, Arena opens normally.

Luego de la ultima actualización de la semana del 12 de marzo, al abrir el juego mi pantalla se queda en negro con el mouse del magic arena pero no pasa nada mas, des instale el juego y lo volví a instalar y pasa lo mismo

Cerulean Drake lost protection from red when taking doublestrike damage from Robber of the rich with Embercleave attached to it.
Lost game because of this bug.
When is this being fixed? I've read a few posts in the forums and this bug has not been fixed since last year! Weak effort on Wizards part for not addressing this sooner.

Seems like a really bad bug due to mono reds massive impact on standard right now!

Since the update on 4 September 2019, the problem of unity crash often happened; After the update on 26 September 2019, unity crash with disconnection problem happened frequently. You will face either one of them and now I totally cannot play even a battle. I think I should leave the game for a period or forever.

Missing Mastery Pass Rewards

Missing Level 103 and 104 Mastery Pass Rewards.

Redeemed code for PLAYELDRAINE and the received a store error code. Checked my packs and they weren't there and then tried reentering the code but was told it was already redeemed

I have completed the White, Green and Red mastery trees. I have unlocked 4 further mastery orbs but am unable to redeem them on the remaining Blue / Black locked nodes.
Trying to click on any of the locked node does nothing, no button appears to redeem.

Try to start a match, and get This Error:

"Network Error: Deck Validation Failed"

I've double and triple checked decks in question, and they are all legal for the match I'm trying to play. This is only happening to certain decks in my collection.

日本語だけの問題です。
カードに「、（読点）」が入っているとエラーと表示されインポートできません

Since the update on 7/21 I can no longer disable my cat pet. You can go to the profile and click to disable. but it is still in every game and teh setting is reset when you check back.

I just received my code for the fblthp avatar in an email. When I redeemed the code it said "store error" and did not reward anything. When I tried again it said the code had already been redeemed.

After finishing a game i was rewarded 2 cards.
By pure luck they were both "Biogenic Ooze".
If no "biogenic Oose" existed in collection before the reward Then the total should be at 2 "Biogenic Ooze" in collection. You can see in the picture that there is only one.
Unsure but fairly certain I had one "Biogenic Ooze" in my collection before the reward. Please fix Collection rewards accordingly

Game unresponsive on Victory screen
had to reboot to get any rewards