How add css/js in module admin?

I'm migrating a module from 7.1.2 to 7.1.4.

In actionAdministration() method of my module, I add custom css and js,

I tried addJsAdmin and addCssAdmin but those methods seem to have no effect.

Note I get same result in a boonex module like World Map. The page seems to work but if I open source code I cannot find BxWmap.js, main.css and forms_adv.css.

Is something wrong with my config?

Ok now after some browser cache update, my custom js is read.

But I still can't check if my js is well loaded into my browser source code.

Is it a security feature added in 7.1.4?

Disable the cache and compression (tools, cache)

Thanks!