Sideboard Disappears
The game removes the BO3 half of the sideboard cards when playing a friend challenge of historic tournament.
On PC
Create a traditional historic deck with full 15 card side board and categorize it as such
Friend challenge to Historic Tournament Match
Select the deck
Actual Result: Play match, after first game the BO3 marked portion of the sideboard is gone. Post match sideboard is missing the BO3 marked portion
Expected Result: BO3 marked portion of the sideboard is there and the deck is not edited

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el_TefO#58639 commented
Still happens, frustrating to concede a match mid game bc half my sideboard is gone.
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brett-o-d#66586 commented
Just happened to me in Explorer Ranked Bo3 going into game 3. The cards I took out of the main deck were visible but the cards not the rest of the cards.
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ironsoap#62392 commented
This occurs with Explorer challenges as well.
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Neffle#27335 commented
The game removes the BO3 half of the sideboard cards when playing a friend challenge of historic tournament.
On PC
Create a traditional historic deck with full 15 card side board and categorize it as such
Friend challenge to Historic Tournament Match
Select the deck
Actual Result: Play match, after first game the BO3 marked portion of the sideboard is gone. Post match sideboard is missing the BO3 marked portion
Expected Result: BO3 marked portion of the sideboard is there and the deck is not edited