Thx everyone.
In my recent case, the pads were good. I check for that in general, but have not seen that hook effect from worn pads before. Another thing to add to my list. I've collected many sticky brake tips over the years. Here's a couple of fun ones: the pivot bolts of center-pulls, the pivot pins of brake levers.
I usually replace the cable and housing when I have this problem, and anytime they look old and worn in general, even without symptoms. And I lube the cable with Tri-Flow. But, I've often asked myself if the lube is necessary in lined housings. Opinions?
I will check all these suggestions the next sticking V-brake I encounter.