Logitech Harmony Hub will not control Fire TV

I have had a Harmony Hub and Fire TV for years and it always worked, until I tried to adjust some custom settings for Delay on Input because sometimes it wouldn’t change the input to my Fire TV….after that, Harmony will no longer control the Fire TV with the remote. I have tried deleting the Fire TV device, deleting and recreating the Watch FIreTV activity, nothing works.
It will pair fine in Bluetooth settings on the Fire TV, it just will not control anything.
Any ideas on how I can get…

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Source: XDA