Still stuttering with TS2 files in 1080i50 
More info please. Do you mean .ts files? From what source? DVD?
Sorry for late reply, had a busy week...
The TS2 files are the streams and recordings from my satellite receiver.
The set-up is: I use the VU+ addon in Kodi for watching live streams and recordings from my VU+ satellite receiver in my Home Network. Intermittently the picture stutters. Sometimes when the picture stutters its enough to press the OK button on the remote to display Kodi's OSD. In that case, the stuttering disappears for a while.
In the previous firmware (1.0.8 android 5.1) I tried lots of scenarios: using VU+ own app, apps from Dream Multimedia, connecting an USB stick with a TS2 file and playing back in Kodi... all gave the same result. Because android 7 gives the same problems in Kodi, I didn't try the other apps yet.
Only when you chose 1080P resolutions in the setup of the HiMedia box, it doesn't stutter at al. The problem with the progressive setup are the very unsharp movements.
Before buying the HiMedia, I used a unknow Chinese androidbox. The streams were always sharp and fluently in 1080i50. Also less sharp in 1080P.