Rack-timeout (0.1.0) and capybara

I was testing my app with the newest version of rack-timeout (v0.1.0), and my feature specs that use Ajax are hanging for minutes at a time before failing. Has anyone else had similar issues with their suites? I am assuming it’s something related to rack-timeout since updating that gem alone causes the problem, and couldn’t find anything related on the capybara or capybara-webkit issues lists.