I have only just signed up to now TV. I've been watching Stargate SG-1 and I've found that every few episodes, it will start from a random time on the episode... as if I had watched this episode previously and left it in the middle. There's no real pattern. Sometimes it will start about 5 minutes in, or 30 mins in etc. Again, I've never had NowTV before a week ago and I'm only just watching these episodes now.
If it helps I'm watching these using Google Chrome on a Windows 11 machine. It's a minor bug but I've never seen this on any other streaming service before. Again this is the ONLY show I've watched on Now TV so far.