That would be illogical... Assuming that the stats carry over to the next event, older players that grinded hard wouldn't even need to do anything, but just login to claim the rewards, while the new players would be hauling ass... Otherwise, to balance things out they would have to increase the difficulty, yet it would make the event impossible to complete for new players (just like this years halloween event - lol).. Basically, it would become a shitshow - not a game that was meant to be fun? So its pretty much safe to assume that the charm progress will always reset on each this (halloween style) type of event.
I'm quite curious to see the dev response to this current shitshow state of the game. Will they just push it under the rug? revert to some snapshot state and compensate? or maybe just apologize and compensate or just apologize in general (most likely to happen) for fucking up unintentionally (yet, disastrously)
The game is pretty new and the fact that there are people who hit stage 9000 due to some fucking bug this early, kinda ticks me off and if nothing is gonna be done over this, well - the game is going to die once more people find out about this (I mean, none wants to play a losing game right? (even if there are no leaderboards, yet))