There were some font regressions in 4.16 that we've since fixed (CL# 3456916 and CL# 3425681). These are affecting live users so we should get them into the next 4.16 build.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-45678 in the post.
|Component||UE - Editor - UI Systems - Slate|
|Created||Jun 5, 2017|
|Resolved||Jun 5, 2017|
|Updated||Apr 27, 2018|