Click the "Add Message" button and blockUI will run until ajax completes and then block ui will unblock.
Now run the same test localhost which has CommandButtonSingleClickRenderer and you will notice the oncomplete is never called. In fact if you look in the View Source HTML the oncomplete isn't even rendered?
@jepsar Go to the showcase here: https://www.primefaces.org/showcase-ext/sections/blockui/blockUIAjax.jsf
Click the "Add Message" button and blockUI will run until ajax completes and then block ui will unblock.
Now run the same test localhost which has CommandButtonSingleClickRenderer and you will notice the oncomplete is never called. In fact if you look in the View Source HTML the oncomplete isn't even rendered?