Ingress only works with worker on rancher-host (2.3)

Hallo,

ingress doesn t work in my rancher23 setup.
etcd and controlplane are running on the rancher-server, all workers are installed on seperate systems.

Today I installed a new rancher23 testsystem with etcd, controlplane and a worker on one single systemen.
Ingress worked out of the box with a nginx system (workload) without any problems.
Is it prerequisite to install a worker on the server?

Thanks for hints.
Ralf