I’d be looking for some unterminated code blocks somewhere in the missing part. I reckon live preview handles that differently than reading view, and that’s what causing the mismatch.
To determine if this is actually the cause, try looking for the missing triple backticks, or potentially try adding (and removing later on) some triple backticks at different places to see what changes.
If this doesn’t help you need to show more of the text. Aka show all of the source markup, and not the live-preview version.