Error “Relay allocation maximum connected players limit reached.“ is present when attempting to join a session after leaving

Reproduction steps:
1. Open the attached project "ReproProj"
2. Open the “/Assets/DA_Minimal_Setup/DA_Setup.unity” Scene
3. Open Multiplayer Play Mode window (Window > Multiplayer > Multiplayer Play Mode)
4. Tick Player 2 in the Multiplayer Play Mode window
5. Enter the Play Mode
6. In the Session Name field, insert “hey” for both Players
7. For Play Mode, insert “1” in the Player Name field
8. For Player 2, insert “2“ in the Player Name field
9. Click the Button with the text “Connect“ for both Players
10. Click the Button with the text “Disconnect“ for Player 2
11. Attempt to connect again by clicking the Button with the text “Connect“ with Player 2
12. Observe the Console

Expected result: No Errors exist, and the connection succeeds
Actual result: Connection fails, and the Error “Relay allocation maximum connected players limit reached.“ is present

Reproducible with: 1.6.0 (6000.2.5f1), 1.6.1 (6000.0.62f1, 6000.2.12f1)
Could not test with: 2.0.0 (6000.3.10f1, 6000.4.0a4) (InvalidOperationException: You are trying to read Input using the UnityEngine.Input class, but you have switched active Input handling to Input System package in Player Settings.)

Testing environment: Windows 10 Enterprise 21H2
Not reproducible on: No other environment tested

Note:

• User also reported Errors “UnityEngine::UnityException: ProgressBarPushScope can only be called from the main thread.” and “TLS Allocator ALLOC_TEMP_TLS, underlying allocator ALLOC_TEMP_MAIN has unfreed allocations“ after trying to reconnect, but CQA could not reproduce them