Mark as solution thanks!
It appears that Facebook has implemented a safety mechanism for shared content. This means that when you share content with certain groups, it may not appear on your profile's news feed immediately. The content will still be visible to the members of the group you shared it with, but not to your entire network. The content will eventually be visible to your entire network after a certain "cool down" period. This measure is intended to prevent spam and inappropriate content from reaching wide audiences on Facebook. If you have any concerns or questions about the safety measures implemented by Facebook, you can always contact their support team.