Issue with TVHeadend?

I’ve got TVHeadend enabled and also the IPTV Simple Client.
Often, when I start Kodi up, it starts to load my channels, but then if freezes (sometimes).
Other times, it loads, but when I go in to view the channels, none of them works (I know when this happens, as there are no channel logos next to the channels).
Other times, it works. There’s channel logo next to the channels and it’s all fine.
But then perhaps an hour or so later, if I want to switch channel, the channel logo has gone and it won’t load the channel, when I choose it.
Not sure if it’s TVHeadend.
Anyone else experiencing same issues?