Access unauthorized files on server like CSS/JS

[wysiecki]

Hi, i've installed authentik to protect my own web app (by a proxy provider in front of traefik [docker stack]).
It is working as expected with one exception, i can access (see by url to js file in browser) js and css files with a private / unauthorised chrome browser.
Am i doing something wrong ? or it is a known issue or wanted behaviour ?
THX
Martin