Activate fullscreen works backward in the browser

When I preview it works fine. When I export then “activate fullscreen yes” doesn’t work and “activate fullscreen no” is going to make the game fullscreen.
A week ago I managed to make it work. It must interfere with some settings.
How do you guys manage to have a fullscreen in all browsers???

i have no problem here with fullscreen even on mobile browser

it’s inconsistent. Today, same code than yesterday, behaves differently.
Doesn’t make sense that a simple command with no parameter could have such erratic behavior

Maybe try on different browsers and in incognito mode