Just a guess, but this bug may be in the ubiquity-frontend-kde package. If so, that would explain why the bug is NOT seen in Ubuntu, Ubuntu MATE, Ubuntu Budgie, or in any of the flavors that use the ubiquity-frontend-gtk package.
Unfortunately, the ubiquity-frontend-kde package doesn't seem to have its own bug submission page, but instead relies on bug reports submitted here, for ubiquity. See https://packages.ubuntu.com/artful/ubiquity-frontend-kde
Hopefully someone from KDE, or whoever is responsible for the ubiquity-frontend-kde package, will have a look at this bug report.
Just a guess, but this bug may be in the ubiquity- frontend- kde package. If so, that would explain why the bug is NOT seen in Ubuntu, Ubuntu MATE, Ubuntu Budgie, or in any of the flavors that use the ubiquity- frontend- gtk package.
Unfortunately, the ubiquity- frontend- kde package doesn't seem to have its own bug submission page, but instead relies on bug reports submitted here, for ubiquity. See https:/ /packages. ubuntu. com/artful/ ubiquity- frontend- kde
Hopefully someone from KDE, or whoever is responsible for the ubiquity- frontend- kde package, will have a look at this bug report.