PrimeIcons won't show when deployed in Dynamics 365 CE Web resource

[speeters-bytem]

Hi,

I'm a newbie in Angular and I'm facing a deployment issue with PrimeIcons.
If I deploy on a local IIS , my icons are shown but I want to use this Angular App as a webresource in Dynamics 365 CE (Formely know as Microsoft CRM) things go wrong.

So my files are all in this location https://mycrminstance.crm4.dynamics.com ... tionMockup
In there I have my js files, my index.html and also my ttf/woff/woff2 and svg files.
I can see in the console or fiddler that I have no 404 errors on any files requested from my site.
the primeicons.css is properly loaded (inside styles.js) but still my icons are not loaded.

I know the svg should be loaded when the css file is parsed so I checked the the styles.js and he did modify the path, instead of '.\fonts..' it is just the filename
src: url('primeicons.eot');\n src: url('primeicons.eot?#iefix') format('embedded-opentype'), url('primeicons.ttf') format('truetype'), url('primeicons.woff') format('woff'), url('primeicons.svg?#primeicons') format('svg')
In the console I do see that both primeicons.woff and primeicons.ttf are properly loaded, no trace of primeicons.svg.
I also compared with the working IIS instance, the primeicons.svg is not showing up in either fiddler or the console yet the icons are shown.

How can I debug this and try to understand where he is missing a reference or something like that.
I already looked at every article on the web but I have no idea what to try next.

Angular CLI: 9.0.6
Node: 12.14.1
OS: win32 x64
Angular: 9.0.6