New to the forum but was looking for help and saw your post. We got a Horizon just before Christmas. initially pleased but did think the android system very poor and sluggish (to say the least).
Some things were bugging me from the start - like how sluggish everything was, from changing channels, to starting up apps, to getting into recordings - but thought as we were new to smart TV's, this was standard. An irritation I could live with I thought.
One major bug was that when recording TV shows on the external hard drive I bought (was a good quality USB 3.0 high speed WD 1TB type), when playing back anything recorded in HD, the picture would occasionally jump - as if the HD quality was too much to write to the hard drive. This I assumed as it doesn't happen when I record TV shows from non HD channels.
Now the latest bug the TV has developed is the sound cutting off when switching TV channels. Just no sound at all. Just picture. I have to turn off the TV and turn back on to get the sound back for the channel I want to watch. Anyone else had this problem bug?