The following screenshot is taken from a Nexus 6 browsing on Chrome 49 on Android 6.0.1. The "s" and "t" --- when they appear together --- are joined by a line. This is not intended. It renders fine everywhere else. QUESTION: Have you seen this or something similar before? Can you suggest avenues of research to solve?
This is called a ligature. The tend to be very subtle, like the ones used for te
ffl combinations. This one is... less so.
You can deactivate ligatures (all of them) using
-webkit-font-variant-ligatures: no-common-ligatures;, but that will also get rid of the (useful) other ligatures.
You might want to check out this StackOverflow question on the subject to further your search.