Originally Posted by lone_par
It seems to be when I go straight to email from the notification. Will speak to HTC and report back.
I had this same issue (using Exchange Server). The only work-around I could find is to remove the Sent and Deleted folders from the Synced items. This keeps them from being automatically synced, but I can still click on those folders and pull up any idea in them. It just takes a bit longer to load, as they haven't constantly been syncing in the background. However, after doing this I no longer have the issue I had as it always just defaults to the only folder I have synced - Inbox.
Hopefully HTC has a resolution - it's inconvenient for work when I'm waiting for my Sent Items to load, as they could be hundreds per day. Not a deal-breaker as I don't do it often, but still inconvenient.