Comment 3 for bug 1792233

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to review all reported bugs in a timely manner.

This release of Ubuntu is no longer receiving maintenance updates:
https://xubuntu.org/news/xubuntu-18-04-release/

If this is still an issue when using a currently supported release of Xubuntu then please let us know.