Making a cross origin request fails even if the correct headers are set

I’m trying to pull some simple json information from an API using a WebApp widget.
When executing the HTTP request, I get the following error:

03-22 14:07:38.215 : Warning / Starfish ( 3643 : 4113 ) : 1.0.0/200925_a4c06d3: Failed to load : request doesn't pass CORS check, please check Access-Control-Allow-Origin header in reponse
03-22 14:07:38.219 : Error / Starfish ( 3643 : 3643 ) : 1.0.0/200925_a4c06d3: console.error: Error while requesting data 

I got this in the config:

<access origin="*" subdomains="true"/>
<tizen:privilege name=""/>

When opening the same webpage using Firefox, the cross origin request works (after setting the correct headers on the server, before that it didn’t). I can see the following headers being returned by the server on both Firefox and Chrome:

HTTP/1.1 200 OK
Date: Tue, 22 Mar 2022 13:09:57 GMT
Content-Type: application/json
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST, PATCH, PUT, DELETE, OPTIONS
Access-Control-Allow-Headers: Origin, Content-Type, X-Auth-Token
Transfer-Encoding: chunked
Server: Jetty(9.4.z-SNAPSHOT)

Anybody got an idea what is causing the issue and how I could work around it?

Please share your Tizen Web app and Web Widget application structure hierarchy.

Thank you,