Single post in Open all -Offline Friends-

There is a workaround. Click the "Open All" link from your party and you'll get https://pokefarm.com/users/(username here),(username here),(username here)#tab=1 in the address bar, with the (username here) being who's on your list. Put a comma and a name of someone who is offline another comma another name until you have a line of everyone on your list who is on/offline. Press enter and it will open all of them.