This happens occasionally when just inspecting a regular web page. But now it happens 100% of the time when inspecting mobile styles via remote debugging. Once you open mobile debugging, the <body> element is highlighted. Clicking on another element inside the <body> used to highlight that element and display the styles on the right side for the new element. It now gets 'stuck' on whatever element is highlighted. You can click on the little arrow (to pick an element), then touch that element on the mobile device and it will highlight it in the dev tools window. But, again, it is stuck. If you want to view the styles of a sub-element, you can not.
What I've tried:
I updated the SDK.
I disabled ALL chrome extensions.
I installed Chrome Canary and tried that.
For now, until this is fixed, Dev Tools is 100% useless to me.