Webservice behind a load balancer can cause connection issues

[Alslinet]

So we tried to put the Webservice behind a load balancer to make HTTPS sligtly easier. And the Webservice is returning the wrong address. Basically it should be https://loadbalancedaddress/..., but it Returns http://loadbalancedaddress:portnumber/…
This causes a Connection error in the script.
I noticed this by testing the Webservice using SoapUI where it seemed to work without problems. But i did notice the wrong address being returned.
Current workaround we are using is just adding a $WebService.URL = "CORRECTADDRESS" to the script.
Im still verifying if this is a Webservice problem or a, im an idiot that has configured something wrong problem. But i thought i would let you know regardless.