Not long ago, I was ranking well for all of my target keywords on Bing. Then, over a few weeks, my website gradually disappeared from Bing, even the URLs that were ranking very well for high-competition keywords. Then, I resubmitted all my URLs for indexing, and my results were back. Then once again, my pages gradually disappeared from Bing.
I post high-quality, optimized blogs regularly and submit them for indexing to Bing and Google, so publishing content regularly shouldn't be the issue. I also have some high-authority backlinks to many of my pages.
What am I doing wrong here? Is it normal to have to resubmit your URLs to Bing for indexing every month or so?