Editing touch layout font size replaces all literal text with codepoints

Using the Keyboard Fonts dialog to change the size of the touch layout font has the unwanted side-effect of replacing all literal text with \u codepoints, causing readability to plummet (at least for humans like me). Here’s a sample of the diffs after changing only the font size:


This problem is present in Kmn Dev 13.0.111. I now see it was also present in 13.0.108.

Workaround: It’s possible to edit the font size directly in the code view of the touch layout without affecting the literal text.

Initial discussion: https://community.software.sil.org/t/bug-editing-touch-layout-font-size-replaces-all-literal-text-with-codepoints/3738