are we gonna talk about the demon that eats your blog if you edit your profile on the app

if you edit any of your profile on the app it (for some reason) changes random parts of your text to different combinations of "ä ę âo" and empty boxes. and the only way to fix it is to delete your code from the app and put it back in on the website 

i dont know why this is ?? ive noticed it on other peoples blogs too