Hi @Folky
Welcome to the Sonos Community.
I have not heard of any incompatibility issues with Sonos and Disney. We recently did a promotion with Disney, and it seems unlikely that would have been done without making sure there weren’t any issues.
I seem to recall at the beginning of the Pandemic there was some announcement about restricting bandwidth usage in the EU/UK for Disney Plus. Not government mandated, though, self imposed.
@Airgetlam is correct - there were restrictions, but all major services were asked to restrict bandwidth, and those restrictions were lifted some time before you posted here (mid-summer 2020)
Are you still having problems? If so, I recommend you get in touch with our technical support team so we can do some in-depth troubleshooting.
If you haven’t done so already, it would be worth trying a reboot of the Arc and the TV (unplugging both from power for 30 seconds) before getting in touch.