Most of my sites are performing as expected however one in particular that has received its usual number of hits today is showing as having just 1 impression and 0 clicks. I've checked the site a few times today and ads were being served as expected so I'm rather confused.

I've had days when Adsense in general seemed horrendously slow to update, however I've never had it confined to just one website whilst everything else works perfectly fine.

Has anyone else ever experienced this?