Problem

Android periodically checks whether a connected Wi-Fi network has real internet access by pinging Google's captive-portal check URL,

{connectivitycheck.gstatic.com}

. When this check fails repeatedly, Android may flag the network as "no internet," and depending on device settings, it can disconnect from, deprioritize, or periodically try to switch away from that Wi-Fi network.

This is problematic in scenarios where the device is intentionally on a network without full internet validation (e.g., local-only or restricted connectivity setups), causing unwanted disconnects/switching behavior.