Also losing matches due to uncastable instants that should be castable.
Jack B Nizzle#02147 commented
I could not cast a one mana white instant spell despite having untapped white mana. It was totally game-losing.
Couldn't cast instants from the second main phase all through opponents phases.
Played on android
Instant not castable during combat phase.
Same issue. Wtf lost me the game hard. Complete ********