yes, this reappeared with the initial wpt sync that was pushed on the 23th and was backed out, then from here on https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&revision=a9e8bb1d8a1617763205dc0ef46ec4fd663113cf&searchStr=windows%2C10%2Cx64%2Cquantumrender%2Cdebug%2Cweb%2Cplatform%2Ctests%2Ctest-windows10-64-qr%2Fdebug-web-platform-tests-e10s-5%2Cw%28wpt5%29&selectedJob=242277295 it fails very frequently.
Bug 1525580 Comment 19 Edit History
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yes, this reappeared with the initial wpt sync that was pushed on the 23th and was backed out, then from here on https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&revision=a9e8bb1d8a1617763205dc0ef46ec4fd663113cf&searchStr=windows%2C10%2Cx64%2Cquantumrender%2Cdebug%2Cweb%2Cplatform%2Ctests%2Ctest-windows10-64-qr%2Fdebug-web-platform-tests-e10s-5%2Cw%28wpt5%29&selectedJob=242277295 it fails very frequently. it failed 161 times since then: https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1525580&startday=2019-04-22&endday=2019-04-28&tree=all