no response timeout

[Stein1308]

Using 3 MiLight wifi boxes v6 in separate vlan for IoT devices (no access to internet).
Homebridge is on pi in another separate vlan.
Routing and firewall rules for traffic between vlan's is ok.
MiLights are working fine, all lights can be controlled by homebridge / homekit.
However log in homebridge is flooded with message from plugin:
Unhandled rejection Error: no response timeout
at Timeout._onTimeout (/usr/local/lib/node_modules/homebridge-milight/node_modules/node-milight-promise/src/milight-v6-mixin.js:128:26)
at listOnTimeout (internal/timers.js:557:17)
at processTimers (internal/timers.js:500:7)