Tvheadend

I just installed TVHeadend and Kodi on Ubuntu 16.04 64bit. For Live-TV and recording I am using an AVM WLAN-Repeater with Dual DVB-C Tuner configured as SAT>IP in TVHeadend.

With TVHeadend 4.09 Live-TV with Kodi didn't work. It was not possible to change channels due to activated "fast input switch" in TVHeadend. I had to restart TVheadend every time before I could change the channel.
So I followed the suggestion to upgrade to TVHeadend 4.1 (unstable repo). I deactivated "fast input switch" and everything seemed to be fine, but now TVHeadend doesn't work anymore after suspend/resume (S3).

After resume it's not possible to use the Tuner. Kodi reports "tuning failed" and it's not possible to login to the TVHeadend-Webfrontent (the login window appears again and again).

Stopping and restarting TVHeadend after resume doesn't solve the problem.
Also stopping Kodi and TVHeadend before suspend and start them again after resume doesn't help. After a suspend TVHeadend doesn't work.
The only way to get TVHeadend work again is to restart the whole pc.

This is a pitty due to planed TV-recordings because the pc has to run 24/7 without suspend (and without saving energy).

I hope you can help me to solve the problem.