Percy test appears flaky with three dots on visual diff #10022
Description
Several PRs are getting the same visual diff issue and causes me to think it may be a flaky test with percy.
Examples:
https://percy.io/ampproject/amphtml/builds/256910
https://percy.io/ampproject/amphtml/builds/256713
https://percy.io/ampproject/amphtml/builds/256555
https://percy.io/ampproject/amphtml/builds/256464
https://percy.io/ampproject/amphtml/builds/255472
More can be found at:
https://percy.io/ampproject/amphtml