The issue here is that Empathy is checking for notification server capabilities and stripping the action hint (because notify-osd doesn't do notification actions), but it isn't changing the message to compensate. In fixing this, please consider that the functionality is absolutely fine where it is with Gnome Shell, and any fix should be compatible with upstream.
The issue here is that Empathy is checking for notification server capabilities and stripping the action hint (because notify-osd doesn't do notification actions), but it isn't changing the message to compensate. In fixing this, please consider that the functionality is absolutely fine where it is with Gnome Shell, and any fix should be compatible with upstream.