Somewhere during the last hour, in mobile web, all the links to posts were rendered solid black and no distinction is made between pages already visited or not:
These used to be coloured in light or dark blue:
Either it's a bug, in which case a fix would be welcome, or it's a feature (it does increase contrast, which may be more accessible?), in which case feature-request please bring back some distinction between visited and non-visited pages.
Android 5.1.1, Chrome 85.0.