Don't know why this didn't appear in my last post, but here is the image with health = or less than 0.
This also shows the Pixel_Hero's current animation as it switched to Down. It has 4 frames where the last frame he is laying down. It doesn't go through any of the frames.
line 102, you had 2 conditions, on floor and health <= which health was ok, but platform was not, since your first action was to disable the platform behavior, which would turn the condition platform on floor as false. even tho the character was indeed on floor.
while the behavior is disabled the condition related to it, it won't disable as well, it will still check for the platform value if its on floor, and since u disabled the behavior you get a NAN there or behavior doesn't exist while condition still exists.
sorry for late response.
the solution was to move the "platform disable action" under the down animation or on bottom of the list of actions of that condition set on line 102.