lantern has time limit?

so when i click the league mechanic when i want to enter new zone and i read through mods and thinking wich mods i wanna put on wich monsters the lantern expires before i have even time to set everything how i want? why is there time limit on lantern mechanic? when the time runs out it says my lantern expired and activated the mods...this has to be a bug right?

LOL for real?

What point does a timer on that serve...

GGG loves their timers!

i mean yea it doesnt make sense adding a timer limit on a mechanic where you need read alot and think...

It rotates on a zone by zone basis every 5 minutes or something, I believe this message occurs when the zone resets to a different set of mods while you are assigning them. They mentioned that the zones would rotate sort of like what tempest used to do I believe, and I think that's what's happening here.

It seems like once you've clicked on the lantern it should just stay on that set of mods for as long as you remain on the lantern screen, but it's also not a big deal that it doesn't.