Every two seconds connected to mqtt server

Hey,
I have a problem with both my zigbee2mqtt PI`s.

Zigbee2MQTT runs on Raspberry PI Zero W with a CC2531 coordinator.

I get every two seconds a message connected to mqtt server.

Configuration YAML:

homeassistant: false
permit_join: false
mqtt:
base_topic: zigbee2mqttwerkstatt
server: ‘mqtt://192.168.2.113:1883’
user: openhabian
password: XXX
client_id: ZigbeeWerkstatt
reject_unauthorized: true
include_device_information: true
serial:
port: /dev/ttyACM0
disable_led: false
devices:
‘XXXXXXXXXXXXXXXXXXXXX’:
friendly_name: Xiaomi_Tuersensor_Werkstatt
‘XXXXXXXXXXXXXXXXXXXXx’:
friendly_name: ‘CC2531’

I use OpenHAB2 latest stable release with the latest Mosquitto Broker and the MQTT Binding 2.5.10

Overall I think that zigbee2mqtt works quite good and only the transfer between openhab and zigbee2mqtt is not that good. I do also have a big delay between the the status and sometimes i also get a false status.

Thank you very much in advance.

Regards, Niclas