Hello,
Please check your shipping plugin instance configuration to see if you set a vendor group setting or something related for restrictions.
If the "shipping per vendor" is not enabled, so you do not have dynamic vendor warehouses in HikaShop (and HikaMarket won't affect the workflow).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.