While there hasn't been a deep-dive technical post-mortem from the maintainers, the Xposed GitHub Issue #467
Even after the web server is "fixed," the backend database might be rebuilding indexes. During this time, you may see partial data or intermittent "500 Internal Server Error." dlxdaxposedinfo down fixed
Users don't uninstall the app the moment the server flickers. Low Overhead: While there hasn't been a deep-dive technical post-mortem