Sonoff TH16 on/off crashes and reboots Homebridge server
Each time I'm trying to on / off Sonoff TH16 relays it causes the crash and reboot of Homebridge server. 

Details of setup.
Homebridge (+ config-ui) 1.3.4 on RPi Buster, Node.js v14.17.0. 
The version of this plugin (homebridge-ewelink) v6.7.0. 
eWelink device is TH16 (4 of them, S20 sockets and RF relay are working properly). 

[5/26/2021, 9:01:56 PM] [eWeLink] [GardenLight (ESP_32D9B7)] current state [on].
[5/26/2021, 9:02:01 PM] [eWeLink] [GardenLight (ESP_32D9B7)] device update failed as WebSocket request was rejected by timeout (6000 ms). RequestId: 1622052115888 at PromiseController._handleTimeout (/usr/lib/node_modules/homebridge-ewelink/node_modules/promise-controller/src/index.js:172:19) at connectionWS.sendUpdate (/usr/lib/node_modules/homebridge-ewelink/lib/connection/ws.js:339:15).
[5/26/2021, 9:02:03 PM] TypeError: Cannot read property 'updateCharacteristic' of undefined
    at Timeout._onTimeout (/usr/lib/node_modules/homebridge-ewelink/lib/device/sensor-ambient.js:111:22)
    at listOnTimeout (internal/timers.js:555:17)
    at processTimers (internal/timers.js:498:7)
[5/26/2021, 9:02:03 PM] Got SIGTERM, shutting down Homebridge...
[5/26/2021, 9:02:08 PM] [HB Supervisor] Homebridge Process Ended. Code: 143, Signal: null
[5/26/2021, 9:02:13 PM] [HB Supervisor] Restarting Homebridge...