Have a look here. If your stick is one of the older ones, the prob is unrelated to whatever operating system. Go get a powered USB Hub. I’d expect the controller not to be shown offline anymore.
If you don’t define a special name/alias for the port, openHAB will find the right one for you normally.
EDIT: To everyone knowing about Aeoctec Gen 5 struggling on a raspi4 port: just do a search for “aeotec v1.” and Alex’s (aka user Celaneo1) post will show up.
Thank you everyone, I’m all sorted now.
I installed openHABian on an RPi3 and it picked up the Z stick immediately and I was able to get my lights setup.
I checked the Aeotec website and my new Z stick is an older model, that sucks.
Moving on… learning more about openHAB.
Nobody has mentioned that the RPi 4 has two USB 2.0 ports next to the blue USB 3.0 ports. Might not work for you, but my old stick worked right away as soon as I switched it to the black USB 2.0 ports on the RPi 4.