Yep probably! Annoying that it only appears to be a problem with the Three network thanks to their data management, my work phone on Vodafone had no issues and my friends both on O2 were fine
I have had this issue on my last 2 trips to London and also in Basingstoke, super annoying when trying to navigate using maps.I also found myself in a restaurant and unable to buy lunch using their QR code ordering system which was a pain