Hi, It's me, the programmer of this game.
Thanks for pointing this problem out.
You were right. There was a problem with game performance that was caused by some heavily parallel processing.
It seems like I forgot to optimize the quest marker that tries to find the event that can transfer player to the destination map.
The funny thing is that I already wrote an optimization system, but I forgot to turn it on at the final hour.
I have to say that we also have problem with time managing too.
It seems a bit late, but I just uploaded a patch to fix this problem.
And thank you very much for playing our game!