I’m quite surprised that there is no reports of this(only one similar, but different).
tl;dr:
Font size small = broken font(most of them anyway)
Font size big(~18) = fonts looks fine.
I created a clean small project imported some fonts(windows arial, roboto(which is works fine, so as ue4 roboto)), I can upload it if you need it.
Recreation is pretty simple, just use custom font, and make it small size, it’l brake. (Funny enough Roboto does not brakes, why?! Even from windows folder)
Similar issue, but probably not related, also pretty old thread:
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Wanted to update that the issue occurs on 4.20.3. I understand the issue is backlogged, however, I wanted to hopefully get it updated as the report only shows 4.16 through 4.18.
