I cant rename a world after I tried renaming it in color.

I decided to write my world name in color but while doing that I accidentally the two "s" shaped signs in a row. Doing that causes the text to become invisible. Now I have a nameless world. This glitch/bug is on 0.13.1 Minecraft Pocket Edition on my IPad Mini. It seems similar to the invisible username issue so I am wondering if an update will fix it or if i will have to do it manually(with a computer or something). Thanks, I am hoping for some helpful answers!