Second this. It's especially annoying when you're trying to get to treasure ninjas when there isn't much time left on the clock. Since you have to take time to load the map, then load the battle which has led to many a page refresh at times and "voilà time's up your 4 unused golden keys is now only 1 for next time enjoy".
So yeah this would at least help those folks who don't have the best internet situations.
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