Every link in content that has href="javascript:void(0)", which is a common way to prevent default link behavior. Example here: https://develop.greenpeace.ch/de/external-link/

A link that isn't to an external page is treated as external link. Functionality is broken (it opens in a new tab) and formatting is wrong (external link icon is added to it).

Links that don't conform to a certain pattern are changed to be formatted as external links (by adding an svg icon and a class name) and target="_blank" gets added the them. The function that does this is greedy and doesn't exclude this case. In this case, the link should not be treated as an external link.

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Reported at Github