I encountered the Event Supply Drop glitch as well, and it was reported on the forum in other threads too. I’m not sure if all players were affected by it, or if it was just a small number.
For example, during the Epic Pterosaur event, if you tried to get rewards from an Event drop with an Alanqa sitting under it, you’d just keep bringing up the Pteranodon and the event status. You couldn’t access the drop to obtain the rewards, no matter how many times you clicked on the actual drop and not the creature.
It’s not all that different from the “dino stuck in Strike Tower” problem, except in this case, you can access the dino but not the supply drop.
If you were fortunate enough to not encounter this problem, @GPx, then I must say that I greatly envy you!