console.log() renders elements as "D.fn.D.init"
After a bit of digging around I managed to reproduce this on a couple of dev sites and I think I've narrowed down the problem.

The issue seems to be with the number of elements being passed to console.log.

This is what the output looks like with 100 &lt;div&gt; tags on the page:

 

And this is what it looks like with 101 &lt;div&gt; tags on the page:



So it seems either jQuery or console.log is imposing some sort of limit on rendering the output. I don't have time to look into it but my hunch would be that console.log is responsible for that.