robots error – sitmap url broken

Hello,
WP Optimize creates a robots entry.
As the entry is super close to the sitemap entry and basically attaches the wpo part directly to the url of the sitmap url… end of the story: sitemap url is broken.
changing the robot manually will always end up in an automatically add of Disallow: /uploads/wpo-plugins-tables-list.json
Any ideas?

https://www.mydomain.com/sitemap_index.xmlDisallow: /uploads/wpo-plugins-tables-list.json