Shelly 1 PM devices: Activation possible / deactivation not possible!
**Describe the bug**
All my Shelly 1 PM devices have been behaving strangely for a few days now: I can activate them, but it's not possible to deactivate them. With the shelly app, everything works fine.  

**Log output**
Nothing in the log:
^[[37m[27.2.2024, 12:55:22]^[[0m ^[[36m[HB Supervisor]^[[0m OS: Linux 6.1.74-v7+ arm
^[[37m[27.2.2024, 12:55:22]^[[0m ^[[36m[HB Supervisor]^[[0m Node.js v20.11.1 /opt/homebridge/bin/node
^[[37m[27.2.2024, 12:55:22]^[[0m ^[[36m[HB Supervisor]^[[0m Homebridge Path: /var/lib/homebridge/node_modules/homebridge/bin/homebridge
^[[37m[27.2.2024, 12:55:22]^[[0m ^[[36m[HB Supervisor]^[[0m UI Path: /opt/homebridge/lib/node_modules/homebridge-config-ui-x/dist/bin/standalone.js
^[[0;37m[27.2.2024, 12:55:30] ^[[0m^[[0;36m[Homebridge UI]^[[0m ^[[0;33mHomebridge UI v4.55.1 is listening on :: port 8581^[[0m
^[[37m[27.2.2024, 12:55:31]^[[0m ^[[36m[HB Supervisor]^[[0m Starting Homebridge with extra flags: -I -P /var/lib/homebridge/node_modules --strict-plugin-resolution
^[[37m[27.2.2024, 12:55:31]^[[0m ^[[36m[HB Supervisor]^[[0m Started Homebridge v1.7.0 with PID: 5423
^[[37m[27.2.2024, 12:55:34] ^[[39mLoaded config.json with 0 accessories and 3 platforms.
^[[37m[27.2.2024, 12:55:34] ^[[39mLoaded 20 cached accessories from cachedAccessories.
^[[37m[27.2.2024, 12:55:34] ^[[39m---
^[[37m[27.2.2024, 12:55:34] ^[[39mLoaded plugin: homebridge-shelly@0.19.1
^[[37m[27.2.2024, 12:55:36] ^[[39mRegistering platform 'homebridge-shelly.Shelly'
^[[37m[27.2.2024, 12:55:36] ^[[39m---
^[[37m[27.2.2024, 12:55:36] ^[[39mLoaded plugin: homebridge-shelly-ng@1.6.0
^[[37m[27.2.2024, 12:55:36] ^[[39mRegistering platform 'homebridge-shelly-ng.ShellyNG'
^[[37m[27.2.2024, 12:55:36] ^[[39m---
^[[37m[27.2.2024, 12:55:36] ^[[39mLoading 3 platforms...
^[[37m[27.2.2024, 12:55:36] ^[[39m^[[36m[Shelly]^[[39m Initializing Shelly platform...
^[[37m[27.2.2024, 12:55:36] ^[[39m^[[36m[Shelly NG]^[[39m Initializing ShellyNG platform...
^[[37m[27.2.2024, 12:55:36] ^[[39m^[[36m[Shelly]^[[39m 19 accessories loaded from cache
Setup Payload:
X-HM://0024HH9M280I7
Enter this code with your HomeKit app on your iOS device to pair with Homebridge:
^[[30m^[[47m                       ^[[49m^[[39m
^[[30m^[[47m    ┌────────────┐     ^[[49m^[[39m
^[[30m^[[47m    │ 613-85-706 │     ^[[49m^[[39m
^[[30m^[[47m    └────────────┘     ^[[49m^[[39m
^[[30m^[[47m                       ^[[49m^[[39m

**Environment:**
 - Shelly device(s): Shelly 1 PM
 - Plugin version: v0.19.1 (together with Homebridge Shelly Ng v1.6.0)
 - Device running homebridge: Raspberry Pi (Raspbian GNU/Linux Bullseye (11), Node.js v20.11.1)
