Error when copy-pasting more than 30,000 characters

I don't know exactly how many characters the error starts.

However, I did notice that when copying and pasting 30,000 characters of text from another document into Novella, a series of errors occurred.

First, a message window in English pops up once at the point of pasting, and then the text cursor becomes invisible.

Also, if I quit the Novella app (desktop) while in that state, the paste would disappear.

If I open another document before quitting and exit, the paste remains, but if I go to another document instead, the text cursor remains invisible. If I turn the app off and on, it comes back to normal.

Can you please confirm?