Gravatar issue in Comments

http://www.dehippevegetarier.nl/katja-nu-geheel-vegetarisch/

Everybody who comments is having the avatar of the author

We use Jetpack for the comments

What can we do to let the people have their own Gravatar used

(if we disable the starbox pro plugin, everybody does have their own gravatar)

Hope you can help

https://ww.wp.xz.cn/plugins/starbox/