RFXcom transmitter. 50% detected

Hi,

I own this CoCo (KaKu) transmitter.


It is built behind an dummy wallswitch. It does not operate on 230v, it just uses a small battery.
apparently HA only sees the “OFF” command, Not the “ON” command.

I hooked my RFXcom receiver directly to my laptop and ran RFXmngr. This is what is being transmitted by the AC switch:

OFF command:
0B1100180183866A02000060
0B11001A0183866A02000050
0B11001C0183866A02000050
0B11001E0183866A02000060
0B1100200183866A02000050
0B1100220183866A02000060

ON command
0B1100190183866A02010F50
0B11001B0183866A02010F60
0B11001D0183866A02010F50
0B11001F0183866A02010F50
0B1100210183866A02010F60
0B1100230183866A02010F60

But, Inside HA, this device is detected, only the off command:
image

I have [Enable automatic add] ticked on.
When I want to add it manually and go to Integration > RFXCom > Options > Enter event code to add > 0B1100230183866A02010F60, the response is “Device is already configured”

What is going on? does anyone have an idea how I can get both states seen by HA?
Is there something Ivam missing here?

Thanks in advance for any help.