Vimkey slows down textarea inputs on Github Pull Requests (large code reviews) even when disabled

When viewing the files of a large PR e.g. `github.com/org/repo/pull/*/files` the commenting input's are impossible to use even with the page "disabled" in Vimkey using REGEX, `^(.*)/pull/(.*)/files(.*)?` which shows it is disabled:


If I completely disable the extension the `textarea` input's are useable again:

https://github.com/Haojen/vimkey/assets/1753298/7e8e43f3-2070-48df-bb35-bf88c76cb89f

I would have assumed that disabling Vimkey for that page would have solved the issue, but it did not. I am also assuming that the fact this PR was so large may be a factor, but I have not yet tested this on a smaller pull request.