Checked the forums and Github bit did not see this bug reported.
On a fresh install of OSMC after changing the Skin font to Arial (Settings->Interface->Skin->Fonts) the text in “My OSMC” becomes very small which would impede nearsighted people.
Default font is fine. Reverting back the font from Arial to default will also revert the text size.
Arial font is desired as it allows Chinese characters to be displayed in menus.
Kodi logs dump:
Screenshot using default font:
Screenshot using Arial font:
Screenshot of font settings: