Same for me, here the solution I found:
I hard changed the code on the files (on the theme/default-bootstrap/) order-address.tpl and addresses.tpl
On these two files, I hide fields letting the customer to add/choose address.
using
style="display:none;
to hide the combo for choosing adress, but allowing the use of the default values - which is the billing address.
or the commenting balise ( <!-- text to hide --> )
to hide the button like "Add new addesse"...
Now in my front end they don't have choice, only one address.