I noticed as of today a change to community.humanetech.com where the username is no longer displayed fully, but truncated and ellipsis are shown. Depending whether I look on mobile or in the browser (both latest FF) only 1 to 3 characters are displayed.
I also looked whether some other admin changed some styles or anything, but that does not seem the case.
Here is an example of how this looks (this on FF 61):
This is taken from a post within a topic, where the browser was fullscreen (plenty of space for username)
Edit: If I switch off the
width: 65px; in CSS class
.topic-meta-data, then the display is as expected.