Domoticz

I have 2 domoticz configurations. Both with a Z-wave AEONlabs USB stick and a RFXtrx433E receiver attached.
One of them can see my new Oregon PCR800 in de Domoticz config the other doesn't. I did test both 433 receivers with RFXmanager separate on a pc and I do see the PCR800 signal comming in on both receivers in the RFXmanager gui. Both Domoticz configuration run different switches and sensors.
It looks like this signal isn't forwarded to one of the Domotics configs?! I did press allow new hardware/sensor in the setting panel ( Dutch / instellingen/systeem / hardware sensoren toelaten etc ) I did reinstall the failing domoticz configuration. ( Latest version running on both of them )
Any suggestion to try?!

Is the PCR800 also received in RFXmngr with the RFXtrx433E on the same location as the Domoticz system?

It is know that the PCR800 has a limited transmit range and this can be improved by installing an external antenna on the PCR800.
https://www.domoticaforum.eu/viewtopic.php?f=27&t=11112

The one receiving is on 20 meters and the one that not receives the signal on 2 meters. But I will test with the RFXmgr in this location. I did it on my desk. Maybe there is something in between causing the error.