UnhandledPromiseRejectionWarning Foscam C2

[domome]

Hello,
When my HB on a RBP boots after turn off I have this error:

[8/20/2019, 3:07:21 AM] [Config] Console v4.6.0 is listening on :: port 8099
(node:399) UnhandledPromiseRejectionWarning: RequestError: Error: connect EHOSTUNREACH 192.168.xxx.xxx:88
at new RequestError (/homebridge/node_modules/request-promise/lib/errors.js:11:15)
at Request.RP$callback [as _callback] (/homebridge/node_modules/request-promise/lib/rp.js:60:32)
at self.callback (/homebridge/node_modules/request/request.js:185:22)
at Request.emit (events.js:189:13)
at Request.onRequestError (/homebridge/node_modules/request/request.js:881:8)
at ClientRequest.emit (events.js:189:13)
at Socket.socketErrorListener (_http_client.js:392:9)
at Socket.emit (events.js:189:13)
at emitErrorNT (internal/streams/destroy.js:82:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:50:3)
at process._tickCallback (internal/process/next_tick.js:63:19)
(node:399) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:399) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

The plugin was working fine till now, and if now I restart the HB from the Config UI X it work's without problems.

[8/20/2019, 9:10:13 AM] [Foscam] Initializing platform accessory 'Foscam C2'...
[8/20/2019, 9:10:13 AM] Foscam C2 is running on port 35851.

The error iIt's only when I turn off the HB

Thanks for your support.