This is caused by the headings lines of the multiple tables. As you can see in the suggestion the text it is talking about is:
| Name || Sex || Age || Status || Relati...
This suggestion can be marked as "False suggestion (hide forever)".
I talked with Aleš about this suggestion being triggered by citations back in September last year. He said "This was intended to find bad gedcoms with a lot of text copied multiple times". He put in a few tweaks at the time to try to avoid the false suggestions. Maybe he could add some more to ignore lines starting with "| " and with " || " in them. Or ignore all lines inside tables.
EDIT: I have sent Aleš a message to let him know about this post.