Here are the April 13 Patch Notes.
Sound
The critical damage sound has been changed.
The Gatling gun firing sound has been changed.
The attack sound of enemies performing field attacks among mutants has been changed.
Bug Fixes
The part where the effect followed the movement direction when canceling the Imperator's normal attack with a dash has been fixed.
The part where the effect followed the movement direction when canceling the Imperator's photoelectric cannon's shot with a dash has been fixed.