2017-05-05 16:12:26.932712+0100 KeyboardTest[1257:707504] [MobileAssetError:29] Unable to copy asset information from https://mesu.apple.com/assets/ for asset type com.apple.MobileAsset.TextInput.SpellChecker
This gets printed to the console in xcode - when focusing on an input, a text area for example and I believe is the reason by the spellcheck option no longer works (i.e. its an iOS issue rather than a Ionic one)
If you google for this error message you can find multiple people asking for solutions, but the suggestion include turning off the spellchecker or supressing the error but nothing really helpful.