The flakiness dashboard (https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#tests=editing%2Finput%2Fios%2Frtl-keyboard-input-on-focus.html) seems to indicate a failure within this range: https://trac.webkit.org/log/webkit/?stop_rev=241284&rev=241317&limit=1000
Truitt found this already in an earlier bug (webkit.org/b/194601) *** This bug has been marked as a duplicate of bug 194601 ***