I've had this happen in two games now, where out in the open religious units are battling it out but then inexplicably one of the AI Civ's will become immune to attack. Not sure if this is a bug or a 'feature' but couldn't find anyone else mentioning it with a google search.
Here's a screenshot of it in action:
I'd been hitting Germany's missionaries at this spot for a while, but now I select my apostle, have as clear a path to the missionary as you can get, right click on it... and nothing happens. In the screenshot that's the second German missionary that made it through to Yeraterenburg in that manner. Meanwhile a little further down there's a Sumerian apostle I had no problem hitting.
I know you can't attack a religious unit if their on a military unit or in a city center/district, but the ones here are clearly out in the open.
(Edit: Just read the sticky and see a few things missing, will get those up shortly)
Here's a screenshot of it in action:

I'd been hitting Germany's missionaries at this spot for a while, but now I select my apostle, have as clear a path to the missionary as you can get, right click on it... and nothing happens. In the screenshot that's the second German missionary that made it through to Yeraterenburg in that manner. Meanwhile a little further down there's a Sumerian apostle I had no problem hitting.
I know you can't attack a religious unit if their on a military unit or in a city center/district, but the ones here are clearly out in the open.
(Edit: Just read the sticky and see a few things missing, will get those up shortly)
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