(playground) pause/1 doesn't give browser time to do something

[Jean-Luc-Picard-2021]

Maybe this is an issue of flush_output/1. But I don't get this example working:

test :- write('Hello '), flush_output,
   pause(1),
   write('World!'), nl.

It waits but Hello is not seen partially:

https://ciao-lang.org/playground/

https://user-images.githubusercontent.com/95891213/185783467-ca7342ea-22cd-4aba-91cb-aa7ded5088ce.mp4

[Jean-Luc-Picard-2021]

A related but different bug here: https://github.com/SWI-Prolog/swipl-devel/issues/1023

[jfmc]

Related to https://github.com/ciao-lang/ciao/issues/58