WordPress 5.2 destroys structured data by adding rel="noopener noreferrer" to widget output (also to shortcodes): How to display the shortcode output without code change?
This feature was added in 5.2: https://core.trac.wordpress.org/ticket/43280
Basically there is nothing wrong with adding
rel="noopener noreferrer" to
<a href="..." target="_blank"></a> links, as it will protect from malicious comments or bad authors for instance.
Anyway I have a shortcode from some plugin which is generating structured data (rating stars) for a website and embedded via shortcode. Adding the rel-Attribute there breaks the structured data (as confirmed by https://search.google.com/structured-data/testing-tool/u/0/?hl=de).
How can I use the shortcode in a sidebar widget with the code preserved?