Steps to reproduce:

1. create a world with multiplayer->invite only

2. ask a friend to join your world.

3. send him/her an invite.

4. kick him/her using Minecraft GUI or /kick command.

5. send him/her an invite again.

Observed results:

The kicked Player can't join the game, unless the Server restarts the world.

Expected results:

Inviting the Player should revoke the "KICK".

NOTE:

I tested this on LAN with both accounts->sign in.