Since two weeks we have marked over 10 issues as intermittent in /css/WOFF2: https://github.com/servo/servo/issues?q=is%3Aissue%20state%3Aopen%20label%3AI-intermittent%20WOFF2

I think something is going on with WOFF2 fonts that warrants an investigation. Anyone familiar with the font stack that has an idea what changed 2 weeks ago that makes these tests flaky?