Location: Checkpoint just after talking to Virgil for the second time. (Virgil's Dialog: Into the Blind World)
Difficulty: Hellish (likely doesn't matter)
Health on respawn: last 1/6 (like doesn't matter)
The player is to pull a lever to extend a time limited bridge (there is a purple mana restore just left of the lever). After dieing to the wave of skeletons and flying beast, respawn and return to Virgil, and jump up onto the platform below the soul wall. Move screen right until you touch the invisible wall, then return to the switch. The R1 click event is not available.
It appears the only option for the user is to jump off the bridge to cause a respawn.
I have not checked to see if this can happen on the first walk up without being at the checkpoint. There is also the possibility that there is a specific scenario just before the checkpoint required for this bug to occur.