While using MTGA on android. I tapped on the daily quest to check what my quests are.

The issue is when I go to tap on the next quest while the current quest modal popup is still up. The current quest modal closes, the tansparent overlay stays open and keeps rest of UI dark, but the next modal popup does not popup.

You can do other normal modal close actions, but because the popup itself is not open you can not do any of those button controls. You can get rid of the modal using other normal expected modal close actions like tap the quest you currently have selected again, tap anywhere on foreground overlay, or tap another daily quest.