Green rail = connected; each mark is a disconnection in this day's log, and the badge names what it was (hover it for the full meaning) — app offline, socket only, network switch, carrier, part carrier, link down, WiFi → cellular, handover, bad wifi / cellular, congested, ap roam, blocked, losing, or no IPv4 / DNS. Red marks a real/long gap, amber a short blip or quality issue. Times are the device clock.

When a socket-only gap lines up (within 15s) with a network condition, it is tagged with the likely cause instead of just “socket only” — battery optimized, blocked, network losing, network switch, link lost, network changed, suspended, no internet, unvalidated, restricted, bad wifi / cellular, low bandwidth, metered, or vpn.