It seems that something goes wrong when trying to delete a shipping address in BackEnd: the address can't be deleted, and site gives back this error message:
Invalid Token, in view=user task=removeAddressST
Anyway a user can normally delete his shipping address in frontend
Joomla 3.7.4, php 7.1.7, VM 3.2.3 build 9587
Thank you, found the problem. Fixed.