Search Engine Bots view your website differently

Sometimes what search engine spiders see is different than what we see.  Some developers build sites in a preferred way without knowing the SEO implications.  Occasionally, a preferred out-of-the-box CMS will be used without checking if it is search engine friendly. The worse situation would be pages that are infected with some type of malware that Google automatically deindexes the page immediately once detected. 

Solution is to use Google Search Console’s fetch and render feature is the best way to see if Googlebot is seeing the same content as you are.