I have a 10.7 ArcGIS Server GeoEvent setup behind a reverse proxy and a web adaptor for federation/auth reasons. I want to expose the Websocket endpoint to use in a website, but now noticed that the Websocket URL via Web Adaptor and Reverse proxy at example.com/<webadaptor>/ws always gives me a 404 - not from ArcGIS, but from Tomcat where the Web Adaptor is running.
I suspect the Web Adaptor 10.7 might not support the /ws endpoint (/rest and /manager work fine though).
Is this known, do I need additional reverse proxy rules?