Hello, how are you? Sorry for the delay in responding, I’ve been very busy.
Please try the latest version of the plugin (Alternative v1.0.1) to see if it works better for you and let me know.
Best regards.
Remember that in RPG MAKER MZ, F5 does not send you to the Title screen, it reloads the game.
And your project must be bugged, or you will have a compatibility problem. I have tested it in a clean project and installed the Visustella Core and I have had no problems. The character stats are maintained when the equipment has evolved.
I recommend that you try to test it in a new clean project to see if it continues to happen to you.