IOS App Texteditor emties text file when editing

Hi all,

sometimes when editing text files via IOS app, it clears the whole file and saves it empty. It often happens on larger files, where I have to scroll to the end of the file to append something. Is this a known bug or is there any workaround? I also noticed, that when editing the text files via IOS app it does not create versions of the file, so Iā€™m not able to restore the former version. Can I activate this?

Thx 4 Help!