Found this article. It is probably ‘Apple’. Just Will wait for a fix 🫤:
“macOS 15 Sequoia Firewall and Network Connectivity Issues
There are some known issues with the built-in firewall on macOS 15 Sequoia:
macOS Firewall Regressions in Sequoia
Apple’s latest macOS release is breaking security software, network connections
macOS Sequoia network issues
Recent security changes in macOS Sequoia may cause connectivity issues. Common symptoms include:
Connection dropping unexpectedly after some time.
Corruption in the received remote display rendering.
While Apple works on a fix, here are a few workarounds:
Turn off the firewall in System Settings > Network > Firewall.
Disable “Limit IP address tracking” in System Settings > Network > Wi-Fi/Ethernet > Details…. This workaround should allow you to keep the Firewall enabled.
We are closely monitoring the situation and will update this article as new information becomes available.”