After almost 2 years of being out of the Bing index, I am finally back in and getting impressions. Here's what I did.

I removed an above fold ad. Right after that was removed, the site was instantly crawled and indexed, but I didn't receive any impressions or clicks. The number of indexed pages rose, then went back down to zero.

Then I noticed that in the SEO Reports on Bing Webmaster tools, it said I had multiple meta description tags. The SEO Framework plugin was causing this issue with my GeneratePress theme. So, I removed SEO Framework and replaced it with Yoast.

Three days later I am getting indexed again on Bing. I now have impressions and clicks for my site.

If you're struggling, I'd say check your ads above the fold, and make sure your HTML is valid and meta data isn't duplicated.

Hope this helps somebody.

I noticed 3 of the sites listed here has GeneratePress as the theme. I use that theme as well. Makes me wonder if it's the theme causing problems.