Capcom announced today that a new balance update for Marvel vs. Capcom: Infinite is set to release tomorrow, January 18, 2018. It fixes some issues with collision boxes and mechanices that resulted in unblockable setups. It will release for PlayStation 4, Xbox One, and PC.
Check out the Marvel vs. Capcom: Infinite update 1.05 patch notes below:
General

Guard: Fixed a bug that made it impossible to block low attacks when turning around
Collision Boxes: Fixed a bug that made hitbox timing inconsistent depending on which direction the character was facing
Shadow: Fixed a bug that caused shadow effects to display incorrectly when recovering from a hit while using a shadow attack
Soul Stone (Infinity Storm): Fixed a bug that made it impossible to switch characters for about 5 seconds if the partner character took damage when the Soul Stone Infinity Storm ended
Character
Captain Marvel

Adjusted Active Switch entrance attack so that knockback distance matches that of other characters

Dormammu

Adjusted ground back dash so that from the 10th frame on, it can be cancelled into an attack

Hulk

Adjusted ground back dahs so that from the 15th frame on, it can be cancelled into an attack

Ultron

Adjusted Active Switch entrance attack so that knockback distance matches that of other characters

Venom

Venom Trap: Fixed a bug that caused two traps to appear when performed at certain times
Venom Glide: Fixed a bug that made it impossible to perform Venom Glide again until landing...