Yes this is a upstream issue. However the seahorse project seems barely active, so if you want to have a working version of seahorse in the next Ubuntu release, you (Ubuntu developer) will need to fix some of those bugs yourself.
Yes this is a upstream issue. However the seahorse project seems barely active, so if you want to have a working version of seahorse in the next Ubuntu release, you (Ubuntu developer) will need to fix some of those bugs yourself.