diff --git a/README.md b/README.md
index fbe32c5..d3e54d6 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,7 @@ Row 0 holds the group buttons. Each one shows the first problem in its group, pl
   | APPS: VISTA SILENT | starts Vista on the Lighting PC if it is not running. A running Vista is never closed. |
   | ARENA | starts Resolume Arena on the Lighting PC if it is not running, then reconnects Companion |
   | OBS | starts OBS on the LiveStream PC if it is not running, then reconnects Companion. If the PC is off, it is woken (Wake-on-LAN) and the button shows WAKING PC; hold again once someone has logged in. |
-  | MIDI: LIGHT PC | no automatic fix. Restarting rtpMIDI drops the PC from every MIDI session and it does not rejoin them, and macOS gives scripts no way to reconnect a named session. Reconnect it by hand in rtpMIDI (session "Lighting PC" → Directory → Connect). |
+  | MIDI: LIGHT PC | no automatic fix. Restarting rtpMIDI drops the PC from every MIDI session and it does not rejoin them, and macOS gives scripts no way to reconnect a named session. Reconnect it by hand in rtpMIDI (session "Lighting PC" → Directory → Connect). **Keep the Lighting PC's network on Public:** its Bonjour firewall rules only allow Public, and on Private it vanishes from the MIDI directory and cannot rejoin a session (2026-10-08). |
   | DANTE: PROP MAC / TRACKS / TRANSL / INGEST GONE | starts Dante Virtual Soundcard's engine on that Mac (`remote-access/mac-dvs-helper.sh`) |
   | DANTE: any device powered by its switch port (today the four Studio B boxes) | power-cycles the port it is on **now**, found by its MAC on the Netgear Dante switches |
   | DANTE: any other device GONE | restarts Companion's Dante module (hardware: if still gone, it is off or unplugged) |