The control-panel thingy _used_ to set https_proxy via /etc/environment, if it doesn't that might be a bug. Or maybe you set it and didn't restart snapd? That would also have this effect.
** Changed in: snapd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1777413 Title: snapd does not use system proxy settings To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1777413/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs