My minecoins aren’t linking to microsoft account (Switch)

My nintendo account is signed into minecraft and when I sign in to my Microsoft account it asks “would you like to transfer your purchases from this device to your microsoft account” I accept and do the remote sign in but when I load minecraft again I have to either sign into my microsoft account again and repeat the process or, I have to log out of my Microsoft account because my purchases aren’t there and log back into it and repeat the process.

 

Why aren’t my Minecoins transferring? And why do I keep getting signed out?

 

(Microsoft tells us to contact Mojang!)