It is definitely not the intention! It seems likely this may be a bug introduced by changes made to support the new Mass Debugger. I see that picking the local player will work if it does not have a MassAgent component on it, but get the scenario you are experiencing once I added the component. Are you trying to get the Mass entity data from your player’s config, or are you wanting the debugger for all the other useful information it can provide for the local player? Toggling the Mass category off allows it to once more select local player as you would expect, but that does not help when wanting the Mass details for the local player.
-James