I searched for the insights BB-Code on Google. This thread seems to be the only relevant result. Please let me know what product has added this BB-Code, or what custom BB-Code settings you are using to create it yourself.
If "insights" is a true BB-Code (it's not handled by a preg_replace call in bbcode_parse_start or bbcode_parse_complete, and actually adds a tag to the parser), then the auto-linker should not be auto-linking if it detects that any tag in $this->skip_tags is currently open.