Once CS tell you it is a 'Known issue & they will log it with their technicians' there is no hope of it being fixed.

I've been getting this response for literally years over the'buyer can't pay as 'you have have not selected a postage method' when 'Freight' is the selected postage method.

It is their convenient standard reply for the Freight option showing up as free postage when a buyer purchases on a mobile device.

Both long-standing 'known problems'- neither fixed!