On our FiveM server, we have the problem, that the duffle bags on female work until you put on custom clothes. they just disappear, but if you put vanilla clothes on the bag is visible again.
Does someone know how to fix this? 
Are the custom clothes add-on or replace? If they are replacing a vanilla gta item it might be a flag in the clothes meta file, try moving it to replace a different clothing item. If it’s add-on it might be a problem with the model itself, then i wouldn’t know how to fix it.