"add server" feature not saving ipv6 addresses

I'm using the Bedrock Server Software to play together with friends. In order to connect, we use my public ipv6 address and port 19133, however whenever we reload the minecraft app, the saved ip and port get erased and must be typed in again in the menu. The ipv6 address gets shortened to the first 4 digits and the port changes to 6000 every time. It is just inconvenient to retype the address every time and it shouldn't be doing this.