ADRF5048-EVALZ not working properly

Hi, 

We recently bought ADRF5048-EVALZ which we want to use for rapidly switching on and off a RF source. When testing the device it starts drawing currents that are much higher than what the manual suggest it should. At the moment we are just powering it by connecting the VDD & VSS pins and measuring the transmitted RF between ports RC and RF1.

Our setup is as follows:

1. Connect GND and VDD at 3.3V, the PSU is limited to 1mA. (draws around 0.3mA)

2. Connect VSS at -3.3V, also limited to 1mA. (draw around 0.9 mA)

3. Measure transmitted RF-tone between RFC & RF1. The power of the RF is -25dBm. 

After a while, typically a minute or two, the circuit starts drawing a higher current and no longer transmits the RF1. If the switch is restarted (turning off and on the power to VSS & VDD), it works again for a short while. 

I've also attached an image of the setup. VDD is connected to channel 3 on the PSU and VSS to channel 1. 

Is the switch faulty, or is there something I'm missing? This is the only tests we have done apart from connecting VSS & VDD individually and noting the current drawn of each. 

Edit: It seems like what's happening is that every two minutes the circuit draws a higher current and automatically switches from routing the RF between RF1--RFC it instead routes it via RF2, then RF3 until it stabilizes at RF4. Any ide what might cause this?

Thank you!