Since iOS11 the iPhone keyboard now sends a left ‘ or right ’ single quotoation mark rather than the simple ascii vertical apostrophe character ' ( hex 27 , unicode 0027 ) that was previously sent. If the apostrophe character is typed at the beginning of the string it is a left quotation mark (unicode 2018) , anywhere else in a string it is sent as a right quotation mark (unicode 2019).
This has broken authentication for many of our users where their username or password used to contain the vertical apostrophe character. I would imagine it will affect many other apps. Did Apple announce this major change?