Think this is same thing I experienced. If you are not already, try adding the "–useLegacyAOT" parameter with value of "yes" to the "Customize Launch Parameters". Place it before "-provisioning profile". Adobe rewrote the IOS compiler, this will set it back to the original version. It will take longer to build but not affect performance. I have never been able to successfully use the new compiler with the ArcGIS for Flex API without having what you described happen. Using the legacy compiler, I have no problems. Hope that does the trick. RAZ
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