Gmail bug?

Anybody else seeing this Gmail Bug? The message preview on the Inbox list shows text from the first message in the thread, even if it’s since been deleted.

Which means when you go to open it, the text you get to read doesn’t match what was in the preview.

It seems to be particularly prevalent in email list discussions, where what I usually do is delete the threads as I read them (unless I have a good reason for keeping them).

I tried to replicate it by sending myself a few test messages, but Gmail didn’t join them together as a thread, and I don’t have time right now to try any harder.