Welcome to both of you!
I'm not sure why the original message wasn't answered in a more timely manner. I don't use the command line - don't even know how. It may be that we just don't have any members participating who use it. About the best I could do (here) is refer you to a reference for command line....umm, I guess they're commands, haha.
https://inkscape.org/en/doc/inkscape-man.htmlBeyond that, I would refer you to the IRC. There are 2 channels, one mostly for users and one mostly for developers. But there's a good deal of crossover, so I'd say either one would be appropriate. If you have a strong suspicion it's a bug, I'd say go for the development channel. Those addresses can be found here:
https://inkscape.org/en/community/discussion/And then there are the mailing lists, which is where developers and many advanced Inkscape users prefer to communicate. I wish they'd make it so that people can post to the lists with subscribing. But unfortunately, that's not the case. Info here:
https://inkscape.org/en/community/mailing-lists/ You'll want to use either the User Community list or the Devel list.
Sorry I can't help more than that.