Unfortunately we've never been able to reproduce this issue. We've had a couple of reports of this and the delete/reinstall always seemed to fix whatever OS issue was happening, but again, this was just a guess on our part since we've never seen it.
I'm really not sure what to suggest at this point. In the past with the deletion and reinstallation fixing the issue for the few folks that it impacted it seemed to point to a device specific issue. But now that it's impacted you on two different phones, I'm really not sure what to make of that.
Are any of your devices rooted or otherwise non-standard? Have you tried resetting the app data, removing the app, turning the phone OFF, then back ON, and then reinstalling MobiLinc?