The plugin is already included in the stable release. They just isn't an ebuild for it. Reproducible: Always Steps to Reproduce: 1. 2. 3.
Created attachment 54076 [details] gst-plugins-jack-0.8.7.ebuild
dont assign bugs if you don't know where they should go, let wranglers handle that.
I just put this to the GNOME component because I thought it would be the right one. Sorry about that.
the jack plugin in gstreamer is broken.