On 14 Nov 2018, at 3:16, Ryan Fitzer wrote:

TextMate version: 2.0-rc.15
macOS Sierra: 10.12.6 (I also see this behavior on Mohave)

List of source files overlap the title bar when scrolled:

I think this is because of having the file browser header in the tab bar, which is something that has been disabled for other reasons.

Latest build (v2.0-rc.18) has this change. So probably not the fix you wanted, but should fix it.