1080 TV playback is choppy

Hello,

I installed Kodi 17 back when it was Beta{3?) and uninstalled it due to choppy 1080 television playback. I thought I’d give RC3 a go and see if it is better. I still have the same issue. The 720 and SD channels are fine and so are 1080p MKV movies but the 1080 tv is very choppy. I did try setting the “automatically adjust frame rate.”

It all works flawlessly on Kodi 16.

I am using TVHeadend 4.0.9 and a Hauppauge HD Quad tuner. The frontend is on a Nvidia Shield TV.
The server and the frontend are hardwired gigabit.
This is the stream profile I am using:

MPEG-TS Pass-through
Default Priority:Normal
Force Priority:0
Timeout (sec) (0=infinite):0
Restart On Error: not checked
Continue On Access Error: checked
Rewrite PMT: checked
Rewrite PAT: checked
Rewrite SDT: checked
Rewrite EIT: checked

Is this an issue or am I missing something in my setup?

Thanks!