This is actually known about, and occurs in the US version as well. Anyone who's ran the game for a decent amount of time has lost a good start to a run to this. It's avoidable as long as you don't eject just as you are crossing over the tile for the dungeon entrance. The swimming in the air glitch is also known, and happens anytime you die outside of the tank in water and also respawn outside of the tank.

Far as I know it's also only applicable in Area 2 because it's the only area that has solid tiles on the top half of tunnel entrances. And I'm reasonably sure it's pixel perfect. Has something to do with the bitmask being interpreted as a sideways doorway at just the wrong time.