Idk if this is implemented or not,but this happened in DIB too.In the setting,you can set the time to 12 hrs past the current time and do arena again without waiting.
I don’t (personally) see how they could fix that, as the in-game timer is based off the device’s clock, which on non-server sided games, you can’t really fix (or so I think). If the game were server sided, it’d be completely online (which they don’t want), and they could use a game clock to fix it, but again, then that’d take the allure away from the game being playable without killing your data (if you’re not connected to a network).
I don’t know how they do it; but infinity blade blocks that exploit
I don’t think it can be call as a bug~~