I think I remember the game screen freezing if I leave it idle. I would have to restart the game to get it working. I don't know if it's a Lawmage Academy specific issue or if it happens with other RPG Maker MV games.
Speaking of bugs, I discovered that running Lawmage Academy on a display that operates higher than 60 Hz causes the timer to count at least twice as fast. You can see it between 0:00-2:30 of the video below where I demonstrate the bug with one of my RPG Maker MV projects (it's actually a different game I'm working on).