co2 monitor v3 /cdm7160 stops sending information/ jamming 433mhz rf devices

[strichter76]

i bought the vthings - co2 monitor v3 with cdm7160, temp/hum, dust sensor and rf433mhz few weeks ago.

the device stops sending information by http to pimatic device. i tried it several times. sometimes the vair-monitor stops sending after 5 minutes. the next time, it runs about some hours or a day or so and then suddenly stops.
when the device stops sending information it is not possible to connect to the device by using config.vair-monitor.com anymore.
when looking up debugging output last line just shows [DISCONNECTED].
another interesting point is: when the monitor stops sending information the rf-433 environment in my appartment is jammed. i have a couple of 433mhz power-switches which seem to be jammed by the rf-433 antenna in the monitor.
when i disconnect the monitor from power, my 433mhz power-switches return to normal operation immediately.

i found a thread which seems to be a similar problem:

http://forum.vair-monitor.com/showthread.php?tid=62

i opened the small compartment with the rf-component inside. all seems to be nice. no loose / unmounted pins.