So recently had Fibre activated and have connected my Freesat box but now unable to receive on demand from Freesat. The box is connected but not loading. Service was fine with previous supplier. Have tried a wireless and wired connection and both are the same.
Have just had Now TV broadband installed today and had the same problem with our Humax Freesat On demand connection.
Rebooted the Now TV hub a couple of times then On demand connected all working OK now.
Good luck and hope this works for you.