There seems to be a bug where both hero talents are available at the same time and Eye of Tyr procs Hammer of Light and you can still use the holy armaments.
It seems to do with one of the tree being empty , for me it was the Lightsmith one.
I’ve imported new loadout
CIEA5ba6OK14IUITjS1kSUVJctNjhZWGLMzMzMLbzMzMmNmxAAAMAAAAAAA0WmZYwMMmxs1GAMGYAYw2AAAMz02sMbzMzsst0yMjNzgBgBzwYA
And while swapping from empty Lightsmith to populated Templar it bugged and gave me to use both. I was able to reproduce it twice but the moment I filled the Lightsmith tree it works as intented and swaps correctly.
/reports/Jz1nA7CMxfqGmvkD
The above warcraftlogs report is the run where I figured out Im running both