It’s almost certainly related to AWS.

Get a dynamic DNS from afraid.org, they’re great. That’ll make it so you can always find your home network without needing to write down your IP address (especially frustrating if it changes).

Then run a VPN server, like OpenVPN, on a computer that is always on and redirect the VPN connection port from your router to the VPN server. If you don’t know how to get into your router’s admin console, LEARN HOW! This is critical to maintaining home network security even if you aren’t running servers.

It’s not easy, but it’s way, WAY more robust than depending on a 3rd party to keep your info (except for afraid.org and they practically NEVER go down).