The issues with untrusted packages does not happen anymore with the latest updates, so I'm closing this issue, the other issues are reported in https://bugs.launchpad.net/apport/+bug/1866996.
The issues with untrusted packages does not happen anymore with the latest updates, so I'm closing this issue, the other issues are reported in https:/ /bugs.launchpad .net/apport/ +bug/1866996.