Thanks for the quick response. I did not stir the wort after topping it off. I thought the agitation while adding the extra water would stir it up sufficiently. I'll make sure to do that next time and hopefully that will be the difference. The beers always taste great and seem to have more...

I expect this question has been addressed in other threads, but I hope someone can answer this perplexing question. It has happened to me several times - but not every time. I made a partial mash IPA yesterday. The malt bill was 10.7 lbs (including 6 lbs of light DME and .5 lbs of Dextrose)...