This is because Apple has made changes to iOS 11 to shorten long app names. If the name is longer than 12 characters, spaces will be deleted. Otherwise, they will still exist.
For example, the Guide book app Guidebookapp will become the " Guidebookapp , and the Gui boo app will remain the Gui boo app Gui boo app .
Using   ( FIGURE SPACE ) works because it is not an ascii space. I hesitate to use this as a solution because it seems reasonable that Apple will “fix” this error and remove   for applications with names longer than 12 characters.
https://forums.developer.apple.com/thread/77832
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