Only wipe real (non-RTT) plugin data on an actual client reboot (boot flag), not on every ordinary OVERDUE/DOWN -> UP recovery. A transient network blip no longer erases CPU/memory/etc. history. Also split the shared time-series chart into separate line/area segments wherever the gap between samples is much larger than the typical spacing, so missing data (host overdue, or history that simply hasn't accumulated across a drop) renders as a visual gap instead of an interpolated line. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DEimzMv4Q5EjFg3hoiZ69T