I got the same issue with both Midweek Magic events last week and the one from this week.
When my reward was a card I already had 4 of, it showed up right away with the gems. For all other card rewards it just froze for 30 seconds to a minute and then closed the rewards screen without displaying anything.
As with other reports I don't have a way to validate if the rewards were properly given since no cards showed as new in my collection.
I got the same issue with both Midweek Magic events last week and the one from this week.
When my reward was a card I already had 4 of, it showed up right away with the gems. For all other card rewards it just froze for 30 seconds to a minute and then closed the rewards screen without displaying anything.
As with other reports I don't have a way to validate if the rewards were properly given since no cards showed as new in my collection.