is a constant image only failure on Windows, and Windows EWS.
Created attachment 448976 [details]
Actual, Expected, and Diff images attachment
I have added an [ ImageOnlyFailure ] expectation for Windows here:
It looks like the failure was introduced in between r287892 and r287903, with the last pass for this test occurring at r287892, and the first failure occurring at r287903. It appears that changes at r287896 deal with animation, and that may be the culprit. But I'm not 100% certain.