Steps to Reproduce:
Using Android Phone (i.e. Samsung note 8) on Wikipedia (tested on several different sites, like the Engilsh version of Wikipedia), while using desktop mode (mobileaction=toggle_view_desktop). This issue does not show up on desktop mobile emulators (like the Chrome dev tools) but only on the mobile device itself.
The search suggestions box does not appear.
Search Results box (and suggestions) should appear also on mobile view. When using responsive skins (like Timeless) and not the Minerva/MobileFrontend view, the mobile device user needs access to the same search suggestions.