2 EMs connected to SmartRF04EB

Wy does it not work to connect two EMs to one Smart04EB?

I have connected two CC1101 EMs by sharing the SO, SI and SCKL line and connecting one CSn line at the time. One EM is plugged in the EM connector and the other is sodlered to the proper pins on P11. With this setup it looks like the CC1101 with the connected CSn line is not able to drive the SO line properly. In SmartRF Studio the state switches between IDLE and SLEEP.

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