On Sun, Jul 29, 2018 at 12:34 AM Allan Odgaard <mailinglist@textmate.org> wrote:

People with this issue, can you let me know:

  1. What is the earliest version of macOS where you noticed the issue?
It started when I upgraded from 10.11 El Capitan to 10.13 High Sierra (I skipped a version).
  1. Is TextMate hidden when the problem happens?
No. However, it might be relevant that I use a multi-monitor multi-desktop configuration.
  1. Is it likely that the file does open in TextMate and the delay is related to unhiding TextMate (or bringing it to front)?
TextMate is not hidden and so I'm pretty sure that the window is visibly not present (i.e. I can see the desktop behind where it is going to appear). The new window does appear in front of other windows on its own, just not promptly.

I can't confirm right now because the problem is not happening (it's intermittent and I haven't identified a cause).