Keycloak 17(quarkus): export binds to

I’m a bit confused about import/export in the quarkus version of keycloak.

Export/import can be done using export|import
Is it supported to do an export while the main server (“ start”) is running? And how about an import?
Furthermore, when doing an export, just after all the state has been exported and the export instance could stop, the export instance wants to bind to; this will likely fail if other processes are already bound to this port. (in our case: we start the server with --http-host ... in order to bind to a specific IP address/port, but export does not seem to support the --http-host option) Why does an export want to bind to that port? Is there a way to disable that behaviour?