https://bugs.winehq.org/show_bug.cgi?id=40066
--- Comment #7 from Dmitry Timoshkov dmitry@baikal.ru --- (In reply to sworddragon2 from comment #6)
The underline below the o is indeed "missing" so you are probably right. Also I'm noticing that the text of "DLL overrides" isn't fully displayed. These issues do still appear with Wine 1.9.12 and a new profile. In the attachments is a screenshot that shows both issues.
Did you build Wine yourself or using a pre-built package? From the screenshot it looks like that you don't have Wine built-in fonts installed, and Wine fonts get substituted by some broken font.