Repro URL : https://testdrive-archive.azurewebsites.net/Performance/LetItSnow/Default.html

Increase number of flakes to 4000 to clearly observe the regression

Regression range:
https://chromium.googlesource.com/chromium/src/+log/974674dd40bbb79bf9849f1ccdbfb98c9826b69b..eb35bbd49aacbaaa015c9cc63d9c6ae16a26d64c

Suspecting: https://chromium.googlesource.com/chromium/src/+/4113351ca0024d9bcb037257db25a77d2a452563

Issue was originally observed on Mac, but it probably affects all platforms.