Hard to say really, however, since it is the most common HTTPS port, it might cause a conflict somewhere depending on your network. Just to point out, but LsAgent already uses HTTPS for all it's connections, even with the default port.
Thank you for sharing this information. We currently don't use LsAgent and only utilize agentless on-premise scanning at the moment, but if we change the port from 9524 to 443, within the Service Options, does this affect anything else?