I can confirm the ability of "Choco, Paradise Seeker" is bugged (see attached Log and Image). In my case I got softlocked in a standard Brawl-Match.

Situation:
Had 3 cards to choose from by Chocos ability (3 birds attacked).
I choosed one (non-land) card for my hand.
Then I had to dismiss two other non-land-Cards which were supposed to go to the graveyard.
The confirm-Button was faded out and there was no way to to cancel the process.
Had to choose surrender to get out of the situation.

When I attack with multiple birds I can choose one permanent to go to my hand. The rest of the cards are being put into the graveyard, the lands are supposed to go into play tapped. Instead they are being placed in the graveyard

How so? Just saying something is bugged is not helpful at all. You have to explain what is not working correctly.