I don't know if this issue has been noticed or addressed yet, but I've notice while on mobile the Logout button is under the Home button. This makes it a bit difficult to go to the board index from another page without accidentally tapping Logout, creating a situation where one might logout several times trying to access the home page.
I can confirm this bug as it happens all the time on my Galaxy S3.
Never accidentally logged out personally but I have noticed it.
It is an issue with your resoluton on the device you are on. Locked and approved for investigation.
Fixed by removing the Helpdesk menu item.