This looks like https://github.com/canonical/operator/issues/827 , and it's likely that re-building the charm for xenial pulling in ops 1.5.3 or newer will fix this issue.
This looks like https:/ /github. com/canonical/ operator/ issues/ 827 , and it's likely that re-building the charm for xenial pulling in ops 1.5.3 or newer will fix this issue.