Is it possible to use automatic refresh function with public IP in NAT?

I am using Bootstrap Studio in a NAT environment. If I preview on the internal IP (192.168.x.x), it is automatically refreshed, but if I preview it on the public IP, the automatic refresh is not applied. If I try port forwarding port 39301 from the router to the internal IP(running Bootstrap Studio on the IP), the auto refresh function does not work. Can I use automatic refresh on public IP?