Todays update did elevate the linux server version to build 7031483, but still showing version v524.11, the Client is now at v527.3 (Rev. 124054). Resulting in still not being able to see the Linux server in the ingame server list, or being able to connect to it via steam server list.
And FYI: i'm also testing a 2x2 Grid in a Kubernetes cluster, server is running and seen by steam... only issue is -> see above...