I hate to +1, but I hit this upgrading from 1.27 to 1.35 and Geertivp's fix worked for me as well. Trace:
Dec 20 2020
Dec 12 2019
For what it's worth, auto suggestions _do_ work on the same affected devices and sites from the search bar on Special:Search (OOUI; T100898).
Dec 11 2019
I can also replicate this at will in Timeless, Vector, Example, and Poncho on Android Firefox, Firefox Preview, and Chrome, against both MW 1.33.1 and English Wikipedia. It also affects these mobile browsers when selecting "Desktop view". No desktop browsers appear to be affected (tested in Firefox 70+, Chrome, and Safari).
Jul 6 2017
Apologies. I have no idea how I moved this, or how to move it back.
Jul 4 2017
Thanks @SamanthaNguyen! That's enough to hack in a workaround for now. I just pasted mediawiki.action.view.dblClickEdit.js into MediaWiki:Refreshed.js and changed the selector.
Dec 19 2016
Sorry, not sure how this got into MW general. I filed it from and for the Refreshed skin project.