Weak RF range JA-82R - RF sensors

[MR Jim]

JA-82R and 10 of my 12 RF sensors suddenly lost communication.
Troubleshooting with Olink - Monitor RF level give: 0,05m =125% 0,2m= 50% 2m=0% signal strength.
This is very short. Must be at least 30m range.

I tried to move the control panel to another location. This to eliminate possible disorders from other devices. Same result.
I had a look at PCBs and supplyvoltages internally an no obvious problem can be seen.
I also tried setting "Higher control-panel reciever-sensetivety" (6941)

Control Panel.
Jablotron OASIS JA-82K control panel
Jablotron JA-82R radio module
Jablotron JA-82y GSM module

Sensors:
JA-81F
JA-80L
JA-83M
JA-83P
JA-86p
JA-80S

Any ideas?
Best regards Jim

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JA-82R and 10 of my 12 RF sensors suddenly lost communication.
Troubleshooting with Olink - Monitor RF level give: 0,05m =125% 0,2m= 50% 2m=0% signal strength.
This is very short. Must be at least 30m range.

I tried to move the control panel to another location. This to eliminate possible disorders from other devices. Same result.
I had a look at PCBs and supplyvoltages internally an no obvious problem can be seen.
I also tried setting "Higher control-panel reciever-sensetivety" (6941)

Control Panel.
Jablotron OASIS JA-82K control panel
Jablotron JA-82R radio module
Jablotron JA-82y GSM module

Sensors:
JA-81F
JA-80L
JA-83M
JA-83P
JA-86p
JA-80S

Any ideas?
Best regards Jim