You can send me your saves but if your saves are running perfectly fine and you can load them without problem, there should be nothing wrong with them. If you want I of course can still take a look at them.
I'm not an expert when its comes to how memory works but I know the RPG Maker MV engine did had some problems with those. Everything over 8 GB is not making a difference for the game. As far as I know the RPG Maker MV games can only use up to 4 or 8 GB max depending if the game is a 32 or 64 bit version.
My recommendation still would be to close the game and restart the game if you playing for 4 to 8 hours in one go. And then the memory will be reset and you can go for another 4 to 8 hours without worries of a crash. Also save often to lose as little progress as possible is always a good thing to do as well.