Tank pod going to power save mode?

Hi

I‘m diving sidemount, so I bought a second tank pod to be able to see both pressures on my MK2i. 

however I never get the Descent to display actually pressures of both tanks. initially they are both connected however after a while the tank that I‘m not currently using is disconnecting.

I suspect that the Tank pod is going to sleep since there is no pressure drop while I‘m breathing from the other tank. That would not be the biggest issues if it was re-connecting when I’m switching to the other tank but it does not.

can anyone confirm my observation and is there a way to disable this power saving mode (if that‘s the issue)

thanks

David