@Trixie799 I'm in the same camp as your friends as 911 shows perfectly on my setup (up to season 7 episode 8). Have you tried resetting your Glass TV? If not give it a try as follows:
Go into Settings > System Management > Resets & Updates > Restart device (do not do a factory reset). It takes about 3 minutes to completely reboot. You will have a blank screen for part of the process so don't panic.
If that doesn't help maybe contact Disney + customer services to see if they can help.
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