if people aren't registered on an HikaShop form, you won't be able to find them in HikaShop listings.
Actually it's not like this.
I have tested further and if the user has logged in at least one time he will be listed in Hikashop customer list, only users that have never logged in are not being listed.
I can easily solve this by auto-logging in usres after they register through my custom registering form then.
Maybe you could check this on your side and correct the issue so that even users that have never logeed in are being listed n Hikashop as customers.
Thank you