Mozregression (run on macOS 10.15 Beta) ````$ mozregression --good 2019-07-10 --bad 2019-07-18```` led me to https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=5671bf0f8a214d690b4754aab8e6304102c1b791&tochange=368e9ae19115fce103b410d423d78076d59db7e7 indicating bug 1560368 caused this regression. But bug 1560368 is only on 70 which wouldn't explain the issue on Beta. I'll file a new bug post details there.
Bug 1556846 Comment 39 Edit History
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Mozregression run on macOS 10.15 Beta 4 (19A512f) ````$ mozregression --good 2019-07-10 --bad 2019-07-18```` led me to https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=5671bf0f8a214d690b4754aab8e6304102c1b791&tochange=368e9ae19115fce103b410d423d78076d59db7e7 indicating bug 1560368 caused this regression. But bug 1560368 is only on 70 which wouldn't explain the issue on Beta. I'll file a new bug post details there.