Tvheadend

I have problems with stutters with BBC streams from IPlayer added in TVheadend.
It seems that it works as it should if i use passthrough only but when htsp or transcoding option is used the stream stutters.

I few examples:
http://vs-hls-uk-live.edgesuite.net/pool_1/live/bbc_parliament/bbc_parliament.isml/bbc_parliament-pa3%3d96000-video%3d1604000.norewind.m3u8
http://vs-hls-uk-live.edgesuite.net/pool_34/live/bbc_news_channel_hd/bbc_news_channel_hd.isml/bbc_news_channel_hd-pa4%3d128000-video%3d5070000.m3u8

Happens on some other streams like NPO too
http://l2cma38a39f84f00579097e2000000.9c6dd29986306c47.smoote3g.npostreaming.nl/d/live/npo/tvlive/ned1/ned1.isml/master.m3u8
http://l2cm0ca1165ec900579096f9000000.fdab8f00cdc0c23c.smoote2j.npostreaming.nl/d/live/npo/tvlive/ned2/ned2.isml/master.m3u8