Blightreach is timed? Does not last the rest of the map

I just completed a blight in a map with Fungal Horizons assigned in my atlas. After I completed the blight, I noticed the Blightreach buff was listed at the top of my screen but it had a timer. By the time I noticed it, the time left was only about 15 seconds. I did not have time to get a screenshot with the buff timer, if I can later, I will attach it. The Atlas passive Fungal Horizons does not mention a duration for the Blightreach buff so I did not know if it was intended or a bug. I was in a white tier 16 orchard map.

Bug Report number 1,286,338,290

I just did this again and the timer was for one minute upon completion of the Blight. I have attached a screenshot:

Also experiencing this. The tooltip for the node doesn't mention a time limit like the Voltaxic Sulphite buff does now. Could just be the tooltip being wrong, but hopefully it isn't that and that the buff is supposed to be permanent.

This buff would be mostly useless if timed. I would expect this to last the entire rest of the map.