Our Umbraco 10.6.1 load balanced site is experiencing issues regarding the preview option and unpublished items. The SchedulingPublisher is approachable with: https://www.example.com/umbraco, the Subscriber is approachable with https://www.example.com. When someone is trying to preview an unpublished page it will redirect from https://www.example.com/umbraco/preview/?id={id}&culture={culture} to https://www.example.com/{id}?culture={culture}. This is the subscriber, the user is not logged in on that instance. Has anyone ran into this issue, or does anyone know a solution for this mismatch?

Keep your setup simple and put the publisher on a separate (sub)domain. Routing /umbraco to a different server doesn't work well.