"Player with provided name does not exist" error when inviting a valid player to Java Realms.

Inviting a player to my realm gives the error message

"A player with the provided name does not exist."
They do exist, and spam-clicking on the button eventually invites them just fine.

Seems to not be a huge deal, just wanted to bring this to attention.

I've attached the before (when IdkCommonSense was not invited),

the after (when he was invited)

and the error when I tried to invite him (without spam clicking)

HOW TO RECREATE:

In my experience, just try to invite someone to a Realm by clicking once on the "Invite Player" button.