How do I stop Safari from defaulting to Bing instead of Google search?

Safari began defaulting to Bing for searches, though I have Google selected, have deleted cache, and have no extensions turned on. It's not that I dislike Bing, but don't like for Safari or Apple to make the decision for me. How do I control the default? (I've set the default under "Safari—Preferences—General—Homepage" to Google. I'm using OS X Sierra, 10.12.6.

Nonetheless........ Help?