MLB.TV App Not Working on Samsung Smart TVs with Firewalla Gold Plus

I’m experiencing an issue with the MLB.TV app on my Samsung Smart TVs fails to load, showing a spinning baseball icon. This issue started after installing my Firewalla Gold Plus and happens across all my Samsung Smart TVs.  Streaming MLB.TV via a browser on a computer works fine.

Setup Details

• Devices: Samsung Smart TVs

• App: MLB.TV (subscription active, app installed on TVs)

• Firewalla: Gold Plus with default settings

  • Active Protect: Enabled

  • Ad Block: Enabled, but TVs are excluded

  • No custom rules except for a Target List and Allow rule for 2 sites I saw being blocked by DNS filtering (I assume active protect) - both has a favorable reputation.

• Observed Behavior:

  • MLB.TV app on TVs shows a spinning baseball, no content loads

  • Browser streaming of MLB.TV works without issues

  • Initially saw blocked flows to lcprd1.samsungcloudsolution.net and tvs.adgrx.com, with a DNS filtering rule.

  • After adding a Target List and Allow rule, no blocked flows are now reported for the media room TV, but the MLB.TV app still doesn’t work

Troubleshooting Attempted

1. Excluded TVs from Ad Block

2. Confirmed browser streaming works, isolating the issue to the MLB.TV app

3. Created a Target List (MLB_TV_Allow_List) in the Firewalla web interface with the following domains:

   • lcprd1.samsungcloudsolution.net

   • tvx.adgrx.com

4. Created an Allow rule for the Target List:

5. Verified no blocked flows for the media room TV in Flows > Blocked after applying the Allow rule

6. Restarted the TVs and reset network settings to clear DNS cache

7. Confirmed Firewalla firmware is up to date

8. Enabled Emergency Access mode for TVs (no effect)

I can connect the TV to my Verizon Hotspot and I can launch the application no problem.  It's the firewall, but I'm just not sure what is blocking it.