Can’t get back to mobile site version of forums.

I normally lurk and read without logging in.

However I logged in tonight and instead of going to the mobile site (as I have book marked on my phone) its showing the desktop version.

When I click on Mobile at the bottom of the page, it takes me to the mobile version of the homepage. All good!

However when I navigate back to the forums, it reverts back to desktop version again. Im stuck in a loop doing this.

Any ideas?!