Please have a look at the attached screenshots from LibreOffice 5.3.6.1 and 5.4.2.1. Both have been taken on the same Windows machine. You can see that with 5.4.2.1 release characters are truncated while this bug does not exist in the older 5.3.6.1 release. Please note: For both cases OpenGL is forced-enabled by (ignore OpenGL blacklist enabled). These problems are not reproducible using Linux. Also these glitches could be associated with a bad Windows OpenGL driver it is interesting why 5.3.6.1 does not trigger the bug while 5.4.2.1 does.
Created attachment 136617 [details] LO_5361.png
Created attachment 136618 [details] LO_5412.png
Just an idea: Could the issue be triggered by any patch the has been intended to solve HarfBuzz-associated regressions?
*** This bug has been marked as a duplicate of bug 111307 ***