MySensors issues, broken pipe, invalid value for data["payload"]

Edit:
I have found the reason! I have a broken node in the network sending out garbage.

I have some issues with MySensors lately. The only thing I see in the logs is the following:
Also, the gateway has errors that say “broken pipe”. I have only 1 instance of mysgw running.

Anyone knows what’s going on?

Feb 12 13:56:21 raspberrypi hass[3166]: 2018-02-12 13:56:21 DEBUG (Thread-23) [mysensors.gateway_tcp] Sending 0;255;3;0;2;
Feb 12 13:56:21 raspberrypi hass[3166]:
Feb 12 13:56:22 raspberrypi hass[3166]: 2018-02-12 13:56:22 DEBUG (Thread-23) [mysensors.gateway_tcp] Received 0;255;3;0;2;2.1.1
Feb 12 13:56:22 raspberrypi hass[3166]:
Feb 12 13:56:22 raspberrypi hass[3166]: 2018-02-12 13:56:22 DEBUG (Thread-23) [mysensors.gateway_tcp] Received 255;255;3;0;3;0
Feb 12 13:56:22 raspberrypi hass[3166]:
Feb 12 13:56:22 raspberrypi hass[3166]: 2018-02-12 13:56:22 WARNING (Thread-23) [mysensors] Not a valid message: not a valid value for dictionary value @ data['payload']
Feb 12 13:56:22 raspberrypi hass[3166]: 2018-02-12 13:56:22 INFO (MainThread) [homeassistant.core] Bus:Handling <Event system_log_event[L]: level=WARNING, message=Not a valid message: not a valid value for dictionary value @ data['payloa
Feb 12 13:56:24 raspberrypi hass[3166]: 2018-02-12 13:56:24 DEBUG (Thread-23) [mysensors.gateway_tcp] Received 255;255;3;0;3;0
Feb 12 13:56:24 raspberrypi hass[3166]:
Feb 12 13:56:24 raspberrypi hass[3166]: 2018-02-12 13:56:24 WARNING (Thread-23) [mysensors] Not a valid message: not a valid value for dictionary value @ data['payload']
Feb 12 13:56:24 raspberrypi hass[3166]: 2018-02-12 13:56:24 INFO (MainThread) [homeassistant.core] Bus:Handling <Event system_log_event[L]: level=WARNING, message=Not a valid message: not a valid value for dictionary value @ data['payloa
Feb 12 13:56:26 raspberrypi hass[3166]: 2018-02-12 13:56:26 DEBUG (Thread-23) 
[mysensors.gateway_tcp] Received 255;255;3;0;3;0
Feb 12 13:56:26 raspberrypi hass[3166]:
Feb 12 13:56:26 raspberrypi hass[3166]: 2018-02-12 13:56:26 WARNING (Thread-23) [mysensors] Not a valid message: not a valid value for dictionary value @ data['payload']
Feb 12 13:56:26 raspberrypi hass[3166]: 2018-02-12 13:56:26 INFO (MainThread) [homeassistant.core] Bus:Handling <Event system_log_event[L]: level=WARNING, message=Not a valid message: not a valid value for dictionary value @ data['payloa
lines 10195-10256/10256 (END)

I see this error every 2 seconds in the log:
WARNING (Thread-23) [mysensors] Not a valid message: not a valid value for dictionary value @ data['payload']