Node Randomly Goes Offline (and/or QUIC Misconfigure) Until Restart

Your configuration has issues with the network configuration. If you use the snap (or other virtualization package managers) version of podman, I would recommend to uninstall it and install a native one either from the packages manager or using the official documentation.

Perhaps it’s the same problem with a firewall as for CentOS:

You should forward it not to the internet but in the reverse direction - from the internet to your node. If you have any outbound rules, please either delete them or disable or add another one to allow connections from your host and any port as a source to any port and any host in the internet as a destination.