Ive run it with both interlaced tv transcode and also run it without and both times it has encounted problems. It would appear that if you start off in direct play i.e broadcast is in 1080p (no need to transcode) but then moves during commercials and/or the next programme which is 1080 interlaced the server is sluggish and does not recognise the change so does not transcode to p. Therefore the original problem returns as you are getting direct stream 1080i
Ive posted logs etc in Live TV channels freeze within seconds on Fire Stick 4k