nonce attribute is empty if config.php : debug => false

[KoolerNolan]

Using <?= $site->nonceAttr() ?> returns an empty attribute, but if printed out in, for example, a paragraphs inner HTML it is not empty. I disabled or removed any plugin manipulating the html code but the problem persists.
If the debug mode in the config.php is enabled, everything works as expected but that is not a solution.

I am using this plugin in Kirby 4.

[KoolerNolan]

Did not know their value is not rendered in the developers tools. My issues were a few other files (swiper.js -> 'swiper-icons', and so on). No issue here then.