Thank you for writing.
I can confirm this behavior. I have logged it in our Feedback Portal
. You can track the item for status changes and add your vote for it here
Unfortunately there is no way to speed up the spell checking at this point.
I hope this is not a show stopper for you.
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos
and start improving your app based on facts, not hunches.