After the new update was released i opend MTGA and played two games of DMU Premiere Draft wich i already started before. After the two games i closed Arena. After some time i reopend Arena to finish my Premiere Draft (i was 4-2).
After the loading screen there was a prompt that i received 1400 gems and three packs of DMU. Looking through the event tabs, i did not see any DMU events.

I hope the events can be returned and i can finish my draft.