Strikers affected by Accuracy Reductions in the opponent
I noticed that my strikers are being affected by any ability accuracy debuffs that I place on the opponent, preventing me from gaining buffs.
Magneto was regularly failing to gain Unblockable when using the Colossus Striker against a magnetized Nebula.
I also saw similar failures using Doctor Voodoo while the Brother Daniel debuff was on the opponent. I'd bring in Colossus after a MLLLL, he'd land his hits, but I wouldn't gain the Unblockable buff.