Vital opens a discord overlay and the overlay only happens in the Vital plugin. I can’t close it with the Shift + ` command, nor can I exit it from the cross. If I’m in a voice call, the icons are in the plugin too. The overlay doesn’t always interfere, but sometimes it stays on.
In this case I would recommend not adding Vital to the list of applications Discord can use for the Overlay as the purpose of Vital isn’t exactly to work together with Discord so this is going to be considered low-priority.
Thanks for the report though!