This issue has been addressed in the Debian git repository for golang-github-appleboy-easyssh-proxy.
The fix involved modifying the integration test to ignore the deluser failure. https://salsa.debian.org/go-team/packages/golang-github-appleboy-easyssh-proxy/-/commit/e845b0e48b91587482a043b9f9740ab11be5a0b6 Closing this bug manually as the fix is now in the latest packaging branch.
