Possible solution to vr / flip in the main world

[Beaner]

Maybe if the player has been recently in a fight (i.e if the player did use a weapon or get shot), the next few seconds, no matter where he is, his vehicle won't be repaired / will keep loose health normally. Even though you can get shot (accidentally or not) and still not be participating in a fight. Perhaps it would be better if it was disabled only if the player used a weapon.

Edit: ^this should also apply to the drivers who try to drive-by.

Those few seconds would be spent in escaping from the damage-prone zone (The Strip or Prickle Pine, as shown in the map). It's still the same situation when the player moves out of it.
However, your idea might work if a player indulges in a fight outside the damage-prone zones (Example: LV Airport) and then tries to escape in a vehicle.