Streaming skipping back 1-2s every now and then

I've recently decided to return to FF. On the whole everything is going fine, except for streaming. I often use my provider's site (nostv.pt) to watch some games, races or shows. However, every time I do, I'll get backwards skips every now and then where the stream goes back 1-2s. Usually the second time this happens the stream detects I'm no longer live and I can skip ahead to real time, but this is annoying, especially when watching games. During a 2h stream session this will happen around a dozen times. So I would like to know if there are other people with the same issue or what I can do to prevent this from happening.