setAlertMessageIOS not always setting the correct message

[pke]

I have strange behaviours in my app when using setAlertMessageIOS.
It works with multiline texts once, but the next call it will instead add ellipses to the text instead of breaking it into 2 lines.
"Line1\nLine2" works only the first time called, but later not again.

Calling setAlertMessageIOS in fast succession also does not seem to change the text.

Any idea what could be going on here?