Assets + Wygwam: Wrong URL on Front End

I've got a Wygwam field that's using Assets for image uploads. I can upload images and they display fine in the entry form, but when I save the entry and then go look at it on the front end, the image URL is wrong. Here's an example:

Correct URL: /uploads/news/Picture_5.png


The strange thing is if I go back into the entry and just resave it, it fixes the problem.