Just an observation, TVHeadend has evolved the way it filters streams over time. I have consistently found that the earlier TVH version of 4.2 tunes marginal Muxes better than later versions - ie all the current 4.3 versions have much worse problems with continuity with poor signals resulting in pauses and glitches in playback.
Every time I have attempted to use one of the 4.3 versions I have reverted back to 4.2 in a few days. Sometimes newer isn’t better.
Shoog