Last weekend I updated my RFXtrx433E from firmware version 246 to 1009. Since this update the RFXtrx has trouble in switching my KaKu front-door switch. It is a switch rather far away from the transceiver but it used to work 99% of the time. Now, since the update, it works 0%

The output power is set to 10 dBm (the max).
Has something changed between version 246 and 1009 which reduces the transmit power, and so the range?
Thanks,
Bernd