TVHeadend client jerky / judder playback on Pi4 since 10.0.2

I've been running TVHeadend Client on my Pi4 since LE10.0 and not had any problems. With the recent upgrade to LE10.0.2, I've noticed the playback of recorded TV has mild jerkiness / judder when playing back recorded 1080p / 50fps files. If I copy and play the raw *.TS file from the TVHeadend Server (A Pi3 running OSMC with Kodi 19.4), to the Pi4 and play it directly, it has the same effect. If I convert the raw *.TS file to *.MP4 and play it directly on the Pi4, I see it too.

However, when I play the raw *.TS file on the Pi3, the effect doesn't happen, but I get an interlaced picture instead.

It seems to be related the new HW decoding for H264 and de-interlacing. I've tried both the force_turbo=1 and the core_freq_min=500 settings in config.txt, but seen no difference.

RESOLVED. I've done a range of tests and it turns out it is the new hardware based de-interlacing with the Pi4 that is the cause of the problem.

If I disable the de-interlacing, the video pans smoothly and I don't get the juddering effect.

I've made a note of this in the LE10 and de-interlacing in RPi4 thread.