I don’t think its accent in fact because I have the same problem, and as a nerd, I prevent using accent in my title (french here too hello).
I send a mail at the developer about this problem, and he doesn’t respond yet. Also, is your Ipad quickly became hot too ? Because mine, yes.
For the moment, the only trick I found is to create shortcut who pull/push when I open app. It works very well in fact.
If only goodnote support pdf save in icloud ;_;. For the moment, I’m thinking about buy the sync because, seriously, i’m bored with this.
Ah, and you can find my tutorial here. If you use it with Obsidian, can you send feedback? I want to know about this trick before paid !