Expected result : With "disableBaseDamage": true in cfggameplay.json, fences, watchtowers, flag poles and shelters stay invulnerable at all times, including after a server restart, as they did in 1.29. Melee, firearms and explosives should do no damage to them.
Actual Result : After any server restart, every base-building object loaded from storage takes damage from melee, firearms and explosives and can be destroyed, even though disableBaseDamage is true. A part only becomes invulnerable again when it is built or repaired, and loses that again at the next restart. disableContainerDamage (tents, barrels, containers) still works correctly.