Everything's coming up bold!

Every time I open a file, all my text is converted to bold.

This appears to be related to my use of the font Cochin.ttc (trying to match the look of Mac Scrivener), though other fonts I’ve added to Windows also have this issue. If I only use Arial in a file then everything is fine, but if any of the text in a file is Cochin, then on reopen the entire file changes to bold.

In addition, if I paste text in this font it will also turn to bold.

Possibly related to https://forum.literatureandlatte.com/t/font-styles-removed-from-formatting-when-you-close-re-open-app/41927/1