Caller ID works at first, but reverts to Unknown after answering call

[enisoc]

Edit: HTC has posted a hotfix for this issue: http://www.htc.com/us/support/tilt-2-att/downloads/

This is a somewhat minor issue, but I'm wondering if it is happening to anyone else. When I get a call, it shows Unknown for a split second, then quickly switches to the correct Caller ID and plays the correct ring tone. So far so good.

However, when I answer the call, it switches back to Unknown. As a result, I can't easily access the various options available during the call, such as seeing contact details, taking notes, etc. Also if I happen to forget who I'm talking to, I have to ask them, which is embarrassing. Ok I'm just kidding about that last part. After the call is over, the correct entry shows in the Call History, which is why I say this is only a minor issue.

What makes it even stranger is that sometimes I can get it to show the right contact during the call, but the fix doesn't last. I've tried deleting and recreating the contact, moving the number to a different contact, resetting the phone, receiving a call when the phone is awake versus in standby, etc. Sometimes I think it's fixed, and then I try it again and it's back to Unknown. I still haven't figured out how to reliably reproduce a solution.

Has anyone else seen this? By the way, this is a stock Tilt2 (AT&T, WM6.5, TF3D) with no customizations.