addons not working properly

me and 4 friends played on an modded map and we had one modded vehicle named the kraz 6316 however when i hopped in the kraz i only had 3 addons available a small trailer with fuel and 2 other things whilst the host had acces to all 10 addons for that truck we could also see the addons he had on but we couldnt select em

i have had this issue too with mods, except the people in my game have 0 addons on their vehicles whereas i have them all.

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