I have a problem when indexing in google search engine. There is a page https://frontext.ru/posts/2020-08-27-making-cross-browser-and-responsiveness-better, so a few days later I noticed that it was excluded from the search list. I began to understand and it turned out that Lighthouse for smartphones throws an accessibility error: 
Moreover, specific elements are not indicated. I checked the page and noticed nothing seriously wrong in contrast. I removed elements, replaced colors, nothing changed. Only code highlighting remains that looks like:
<pre class="hljs" style="display: block; overflow-x: auto; padding: 0.5em; color: rgb(51, 51, 51); background: rgb(248, 248, 248);"><span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: 700;">if</span> (<span class="hljs-string" style="color: rgb(221, 17, 68);">"ontouchstart"</span> <span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: 700;">in</span> <span class="hljs-built_in" style="color: rgb(0, 134, 179);">document</span>.documentElement) {
<span class="hljs-comment" style="color: rgb(153, 153, 136); font-style: italic;">//if true</span>
}</pre>
Tell me, what could be wrong, or is there another problem? Other pages with no highlighter are indexed without any problems. Nuxt.js site, if it matters.
https://developers.google.com/speed/pagespeed/insights/. – Trebor Aug 31 '20 at 19:58