Thanks for the ping, Simona. I believe this spike is indeed caused by bug 2038491, which can now cause a scroll-driven synthetic mouse move to perturb the "helper_bug1669625.html" subtest, and I have put up a candidate fix in D303600 that disables synthetic mouse moves for that subtest. I have pushed two try runs to confirm this fixes the spike before landing: a baseline without the fix: https://treeherder.mozilla.org/jobs?repo=try&landoInstance=lando-prod-2025&landoCommitID=52108 a push with the proposed fix: https://treeherder.mozilla.org/jobs?repo=try&landoInstance=lando-prod-2025&landoCommitID=52107 I will follow up here once the results are in. Keeping n-i set.
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Thanks for the ping, Simona. I believe this spike is indeed caused by bug 2038491, which can now cause a scroll-driven synthetic mouse move to perturb the "helper_bug1669625.html" subtest, and I have put up a candidate fix in D303600 that disables synthetic mouse moves for that subtest. I have pushed two try runs to confirm this fixes the spike before requesting review: a baseline without the fix: https://treeherder.mozilla.org/jobs?repo=try&landoInstance=lando-prod-2025&landoCommitID=52108 a push with the proposed fix: https://treeherder.mozilla.org/jobs?repo=try&landoInstance=lando-prod-2025&landoCommitID=52107 I will follow up here once the results are in. Keeping n-i set.
Thanks for the ping, Simona. I believe this spike is indeed caused by bug 2038491, which can now cause a scroll-driven synthetic mouse move to perturb the "helper_bug1669625.html" subtest, and I have put up a candidate fix in D303600 that disables synthetic mouse moves for that subtest. I have pushed two try runs to confirm this fixes the spike before requesting review: a baseline without the fix: https://treeherder.mozilla.org/jobs?repo=try&landoInstance=lando-prod-2025&landoCommitID=52117 a push with the proposed fix: https://treeherder.mozilla.org/jobs?repo=try&landoInstance=lando-prod-2025&landoCommitID=52116 I will follow up here once the results are in. Keeping n-i set.