Bugs can be reported here.
When submitting a bug report, please attach system log coming from the journal:
- $ journalctl --no-pager > system-log
And the output of the following two commands:
$ nmcli d $ nmcli c
It is a good idea to set the log level to DEBUG so that the verbose information is provided. To do this for NetworkManager please see the Logging Messages page.
If there is a modem and the modem-manager snap is installed, also add the output of
$ sudo modem-manager.mmcli -m <N>
$ sudo modem-manager.mmcli -L