On 16 May 2020, at 22:58, Rob McBroom wrote:
I thought it was an issue with light themes since it wasn’t happening with most files. (My default theme for most things is dark, but Markdown files use a light background and my default for new documents is Markdown.) Anyway, it appears to be theme-specific. I tried another light theme as my default for Markdown and didn’t see these problems.
The problem is with themes that set a background color with an alpha component (other than 1).
Fixed with this commit: https://github.com/textmate/textmate/commit/66c1bc7f78c96076d0e8148bd7cc9835...
I haven’t pushed a new build yet, but you can workaround the problem by removing the alpha component from your theme’s background color.