carried mobs doesnt add the weight from their bag

[Ignaramico]

Describe the bug

messing with the petpack mob carrying size, discovered that if you put a bag on a mob and then put items in said bag (i just tested with a zombie) then you wear the petpack (didnt test putting it in inventory) you only get the added weight from the mob inside the petpack without the added weight that is in its bag

Steps To Reproduce

make the a custom item with copy-from of a petpack, and change the size to huge
use a spell to give the mob ( i tested with a zombie cop) the charmed and pet effect
put a bag and put some items in it
carry the mob and check your overall weight

Screenshots

No response

Versions and configuration

OS: Windows
OS Version: 10.0 7601
Game Version: ce2c8fc [64-bit]
Graphics Version: Tiles
LAPI Version: 2
Game Language: English [en_US]
Mods loaded: [
Bright Nights [bn],
Disable NPC Needs [no_npc_food],
Simplified Nutrition [novitamins],
No Rail Stations [No_Rail_Stations],
Prevent Zombie Revivication [no_reviving_zombies],
Limit Fungal Growth [limit_fungal_growth],
Item Category Overhaul [Item_Category_Overhaul],
UDP Redux [udp_redux]
]

Additional context

the weight limit from the mob works correctly ( i guess since i dont know the formula or parameters) since i tried to put in a backpack an anvil, and the log message said it exceeded the mob weight carry capacity