docker environment variable INT_IP not woking


I am having troubles with using ES 4.03 in combination with the environment variables, especially the EVENTSTORE_INT_IP.

when i look at the environments set on the ubuntu system i can see the EVENTSTORE_INT_IP is set with the correct IP.
EVENTSTORE_EXT_IP is working as expected

but in the ES logging i see the environment variable is not being used by ES.

What could cause this? i must be missing something…