This is related to the Official Discourse Calendar (and Event) Plugin.
When I was attempting to bulk-invite a user, I noticed that every time I chose someone in the “Select” dropdown field, their username would not be populated in the box.
However, I’ve also noticed that even though it was not visually apparent the user was selected, if you were to then choose a status for them such as “Going” then press “Send invites”, the task would be completed normally.
Has anybody else encountered the same issue here?