The contents headline show up, but there's no link to show the TOC. I can reproduce this on Firefox (57.0.1 on both Ubuntu and Android) and Chrome (Ubuntu, 62.0.3202.94).
- There are styles in skins.minerva.tablet.styles and skins.minerva.base.styles relating to 'toc-mobile' in Minerva. Move these to a new style module in MobileFrontend called "mobile.init.styles" that loads on page load for all mobile pages (including Timeless mobile) and remove them in Minerva
- Move skins.minerva.tablet.scripts/toc.js to MobileFrontend's mobile.init module so it runs on Timeless mobile.