Choppy viewing when recording another program

Using Linux Mint (Mate x64 V18 – fully updated), with Kodi and TVHeadend (4.0.9-16~g63c1034~xenial).
Has been working OK until yesterday, when Kodi was updated to 2:17.0~git20170210.1529-final-0xenial.
Now, if recording one program, and watching another live, in full screen, the video is very choppy. If I then take it off full screen, but maximise the window (ie almost full screen, with just the linux panel showing, the video is fine. Even if I leave it full screen, but show the info at the same time, there is no choppiness (if that’s a word…)
Thanks.