If you use Special:Contributions in desktop mode, set a date filter (i.e. only edits before Month, Year), and then click the "Mobile view" toggle link at the bottom, instead of showing the Mobile version of the same page, a "No such page" is displayed ("Cannot look at history for a page that doesn't exist. It may have been deleted or you may have followed a bad link.")
This is because MobileFrontend currently replaces the special page with its own version which is less feature complete.
To solve this problem a big overhaul of Special:Contributions in core needs to happen.