Sideboard and Draft are broken
In general sideboards are completely broken on Android again. I frequently won't be able to sideboard cards in or out before the third match and if I accidentally remove a card from my deck that is a one of I have to close the app and open it back up which then reverts the deck back. Overall this is just a ridiculous bug by itself. BUT even worse is during draft I am now unable to see the details of what cards I've selected or move them to the sideboard. Whatever the development team keeps doing to break sideboarding they need to stop because this like the third time in the last year that a random update has completely broken functionality that was previously working fine.

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sleep#81394 commented
Also noticed this. Note that this applies to the "vertical" view. What I think is happening is that the widget responsible for displaying the sideboard is configured to be on top and prevents user input to the underlying "deck" widget. E.g. if I move some cards to the sideboard in the "horizontal" view and then switch to the vertical one, I can see these cards above the ones I the deck.