Isaac Sim headless doesn´t use Proxy

Hay,
When I start isaac sim (headless native), whether through the omniverse launcher or the terminal, I get the following errors when loading an NVIDIA sample/materials from the server.
I suspect that even though I started the launcher with --proxy.server=xxx, isaac sim is not using it. Is there another way to assign the proxy server to isaac sim?

When I enter the website shown below in my web browser I reach it without any problems.
http://omniverse-content-production.s3-us-west-2.amazonaws.com/Materials/Base/Wall_Board/MDF.mdl.

Error Messages:
2022-10-14 05:41:56 [157,458ms] [Error] [omni.kit.browser.material.data] Timeout 5 seconds when reading subidendifiers from http://omniverse-content-production.s3-us-west-2.amazonaws.com/Materials/Base/Architecture/Shingles_01.mdl. Please check your network and connection to the url. Otherwise increase the timeout.
2022-10-14 05:42:18 [179,456ms] [Error] [omni.kit.browser.material.data] Timeout 5 seconds when reading subidendifiers from http://omniverse-content-production.s3-us-west-2.amazonaws.com/Materials/Base/Wall_Board/Cardboard.mdl. Please check your network and connection to the url. Otherwise increase the timeout.
2022-10-14 05:42:38 [199,459ms] [Error] [omni.kit.browser.material.data] Timeout 5 seconds when reading subidendifiers from http://omniverse-content-production.s3-us-west-2.amazonaws.com/Materials/Base/Wall_Board/Gypsum.mdl. Please check your network and connection to the url. Otherwise increase the timeout.

Hi, I believe Omniverse Kit and Isaac Sim does not support proxy servers as a flag. It only works for the Launcher.