Could not filter/choose basic lands while sideboarding for a Traditional Draft.

• I was playing on an iPad.
• This was the first match of a Traditional Draft event.
• After the first game, I attempted to change my deck to include non UB colors.
• Usually, I could click on the gear icon, which gives me the option to select other basics to add to the deck.
• In this case, nothing happened when I tapped the gear icon.
• I reset the app. That did not resolve the issue.