I believe this is related to several snapd bugs on content interface handling which are currently being worked. See lp:11645731 for example.
There are workarounds in that bug. You can also disable, enable the app snap, connect again and it generally works.
I believe this is related to several snapd bugs on content interface handling which are currently being worked. See lp:11645731 for example.
There are workarounds in that bug. You can also disable, enable the app snap, connect again and it generally works.