Hauling Post causes lag when storage is full

recently i noticed significant lag during daytime on my world, it has 300 beavers and the performance is usually around 30 updates but it drops to 2 or less. after pausing buildings and testing which building is the problem i noticed that the hauling posts cause significant lag if all storage is full and basically nothing can be moved around.
in my world i planned to haul water uphill and let the beavers dump it in a big reservoir that will supply the rest of the map with water, with 80 water tanks, 20 pumps and 4 hauling posts in the riverside settlement the performance is ok at 30 updates orso, however when the water tanks are filled up it drops down to 2 or less, pausing the hauling posts removes all the lag immediately and unpausing causes the lag again.
it might not be just for the hauling posts but every building that can move items between storages, but its hard to test by just playing