Silent Login
This is a new feature in Reason 12.2.9 standalone. If you have ticked the box "Remember my password" in Reason's login window you will be brought straight into Reason without getting prompted with the login window the next time you start Reason. This is identical to how it already works in Reason Rack Plugin.
There is a new tab in Preferences called Account Settings where you can see who is logged in - and you can also remove the stored password here: