I can not stop the process of asynchronous upload.
Here's a new build that should fix the problem: http://www.chilkatsoft.com/download/preRelease/chilkat-9.5.0-ios.zip
Thanks jpbro! This problem was found and fixed in private email, and the fix will be included in the v188.8.131.52 update, which may be released today, depending on how things go.
Now it works perfectly.