Cleric Travel domain power Agile Feet

[Grom Kranock]

When does the power take effect?

Agile Feet:

Agile Feet (Su): As a free action, you can gain increased mobility for 1 round. For the next round, you ignore all difficult terrain and do not take any penalties for moving through it

I read it as only functioning the round AFTER you activate it but I think this is silly. How do others play this?

[QuidEst]

It lasts for one round, starting when you activate it. "For the next round" is like saying "for the next hour" or "for the next six seconds".

[Grom Kranock]

Yeah that makes more sense to me. That is how I used to play it but at a few tables I have played at lately the GM interprets it different which makes thing difficult.