On 8 Feb 2021, at 16:47, Tobias Jung via TextMate wrote:

Maybe it depends on the macOS version, so which one are you using?

That appears to be the case: The issue exists for macOS 10.14 (and earlier), but only when I build on macOS 10.15.

Jacob: Are you reading this? ;) This is one of those pesky issues I was referring to; upgrading my build environment can introduce problems that only show on older versions of macOS.

The bundle editor window is currently created from a nib file, so it’s a bit hard to debug the issue, but I’ll redo it in code and push a build shortly.