"Structure should be not attacked for X seconds to start healing" not working

This option doesnt work for me.

If I upgraded a wall it starts healing.

Well because it was not attacked last 60 seconds, right? :P
Looks as i need to add additional timer in config

Basically I thought that once the wall was repaired it would stay at 10hp and when 60s or 30s passed it would start to rise in life.

Sry for my english