Logging into desktop Commons does not also log you into mobile Commons. Logging into mobile Commons does not also log you into desktop Commons. Authentication sharing between mobile and desktop versions of the other projects seems to work fine.
Steps to reproduce:
- Go to https://commons.wikimedia.org/wiki/Main_Page
- Log in
- Go to https://commons.m.wikimedia.org/wiki/Main_Page
Expected result: You are still logged in
Actual result: You are not logged in