Hey Factory!
Yeah, I did. Mainly cause when I used nanobots, it wouldn't register the walls to the list of entities needing to regen health. So, I originally used a rescan of the map method to do it, but found out quickly it caused a quick stutter on the player. I was able to fix this by finding another way and removed the rescan function out.
In terms of your finding, I did not know about this! For the healing effect, I just took the health of the wall and added on a small bit of health every second.