happend to me aswell in strixhaven quick draft.
logs are attached.

please refund the coins.

My first pick "Ob Nixilis" turned into "A liitle chat" during the draft although even their catchphrase was played. At end of draft I couln't submit a deck when the error was detected.

A log in which the selected card is replaced with another one

Got this problem again today.

Wrong card was put in my deck with a error after building the deck, need a refund for quick draft.

This problem has been out there for quite some time now. During Mid Week Magic event of phantom quick draft for SNC several weeks ago, it was already an existing bug. It makes drafting process in quick draft such an annoying experience. Hope it is fixed as soon as possible.

During my SNC draft, I picked a Forge Boss. However, what showed up in my pool was a Ominus Parcel. I figured I had just misclicked.

However, after completing the draft and building my deck, I encountered a server error and had to build my deck again. This time, the Forge Boss was in my pool, and the Ominus Parcel was not.

New Capenna Quick Draft.

Wrong cards added to pool.

First pack I picked black market tycoon and Exotic Pets was added to my card pool. It happened with a few other minor cards too.
Then second pack I first picked Jaxis, the troublemaker and Rumor Gatherer was added to my pool.

Funny enough both Exotic Pets and Rumor Gatherer were the first card on the second round of cards. I stopped the draft and not playing with wrong cards and costed me 750 gems

ドラフトでピックしたカードとは別のカードが取られてしまいます

Street of New Capenna Quick Draft event, At the end of pack 2 I had one card left to choose (Cement Shoes). I dragged it over to sideboard. It didn't appear at all afterwards in sideboard. I would like a refund of my Coins as I had chosen other cards to synergy with that one.

Happened to me too. Picked a celebrity fencer and got a land

Was playing a quick draft and on the first pack I picked a Celebrity Fencer. Got a land though, thought "ok, i must have missclicked" and kept drafting. After I was done and had buit the deck, I got an error message saying that the deck couldn't be submited, and when I went to build it again the land had turned into a Celebrity Fencer. Thing is, I picked the rest of the cards based on having that land and no Celebrity Fencer (till i got one), so this made me make bad choices. Ended 0/3. Didn't screenshot the error message and didn't record the draft, but here is my deck with two celebrity fencers.

Same happened to me: P1P1 Inspiring Overseer turned into a Sewer Crocodile, changed my picks during draft, then changed back to an inspiring overseer once draft was done and I "submitted deck" (resulted in error, open back up to make my deck and there's my extra inspiring overseer).

Need refund.

17lands draft log: https://www.17lands.com/draft/1304c95474ba4e99b849d8b40bbc7068

Same happened to me, 1 land and 1 card disappeared. Bug, need refund

During the draft i picked some cards (expendable lackey and case the joint, but it showed as i picked R/G dual and a (second copy of) brokers hideout. I drafted accordingly, but during deck construction it showed me the lackey and case again. It's a BUG

During Streets of New Capenna Quick Draft, my picks show up incorrectly after I confirm my pick. This can be reset by exiting and rejoining the event mid draft, but that's cumbesome.

This was also an issue during the New Capenna Phantom draft event on May 3-5. I was disappointed to see that this issue continued into the regular quick draft events.

See the following picures for comparison after picking Celestial Regulator before and after refreshing the event.

There is a problem with the drafting since the introduction of streets of new capenna where you select cards while drafting then the ga,e gives you a random one in the pack feels like its messing up my whole draft where it will pick a card at random for me. this is in the bot draft so i know its not the clock counting down and random picking. needs to be fixed asap

Another "network error" bug
i lost masked bandits & cabaretti courtyard

Like many of you I have been suffering from this bug in the last few days. unfortunately I am closed at home due to the covid and the time dedicated to arena has gone from 1 hour a day to 10 hours a day ... I am constantly encountering this bug, in the last 2 days I think it happened in 5 out of 6 drafts. I attach the logs hoping they will solve the bug.

I have had an error several times during quick draft SNC on PC where after building my deck i get a server error - unable to save deck. This results in having to go back and rebuild the deck. My partner has also expereinced this several times. I think the cause is as below:
I finally realised today that the client is actually displaying incorrect cards selected during the draft which is causing this error when trying to save. During a draft today I thought I selected a second Obscura charm but my list was only showing 1. I figured i had misclicked and when another charm came round I took this instead. On the build deck screen at the end, it clearly showed 2 obscura charms. I built my deck and clicked done, to have the server error and had to go back to the build deck screen. However, this screen now displayed 3 obscura charms and once I had built my deck it saved correctly. Not only is it really annoying to have to go back and rebuild a deck a second time, but to find that I have drafted a card that i did not need or want due to a display error is frustrating to say the least. I cannot remember what other cards were available when i picked the unnecessary 3rd card but my choices are being influenced by a fault with the client. I have not taken screenshots as Iit was too late when i realised what had happened, but please fix this!