"Case of the Gateway Express" vs "Phyrexian Vindicator" wrong damage
When you play Case of the Gateway Express against a Phyrexian Vindicator, the damage is being multiplied for each creature multiple times. So if you have 5 creatures in play, Case should do 1 + 1 + 1 + 1 + 1 = 5 damage. Phyrexian Vindicator should prevent 5 damage, and then deal 5 damage to any target. Instead, you get 5 activations of the Phyrexian Vindicator's ability on the stack doing 5 damage each, 5 x 5 = 25 damage, which can then usually kill your opponent outright.
I tried this with Outnumber and Grapeshot to see if it did something similar, but those processed the damage correctly. Seems to be a bug with how Case of the Gateway Express calculates damage against the Phyrexian Vindicator.
Platform: PC.