I had similar experiences with Joplin. Would randomly lose quite a lot of data, and exporting to other formats was a hassle. I also cannot recommend.

I wonder if it’s just a throwaway production hoping to go viral? I used to see a lot of art from the manga in a sort of “yo wtf is this? lol” kind of way. Maybe they’re banking on that meme potential, hoping it will be sufficiently attention grabbing to get people talking?