Discussion:
A lovely little phonologically mediated lexical error.  
It's interesting that this happens even when typing: problems and promises
begin with the same stressed syllable.  Interesting also that the typist here dutifully affixed the plural morpheme.
In case you are curious, 
 VoiceOver 
is a nifty little  feature that allows a blind person to use an iPhone like a boss... unless an app developer decides that including it in their design is not a priority.