Take my apologies if the question is dumb.
I'm working on my Websharper project using 3 different computers. Sometimes when I pull a new code to any machine and hit 'build and run' (Ctrl+F5) my browser would display an old code instead of new one. 'Clean' and 'rebuild' don't help.
What's going on?
'Ctrl+F5' in the browser solved the problem, thanks to @cadull