Issue on featured slider

I have an issue regarding the featured slider. I took 3 postings and I registered the IDs for featured slider, but it doesn’t work as I expect.
The pictures are different, but only one picture is being displayed all the time.
I registered one picture as a featured image per a post.

*If necessaary, please see and the attached file and my website:
http://travel324.net/en/

I would appreciate it if you could notice any information and help me with modifying the website.
I look forward to your support.
Thank you.

Hi @aquamarine324,

I hope you are well today and thanks for posting here.

I could confirm the issue on your site but it’s working fine for me using latest version of Travelify theme.

This can be child theme issue on your site so to confirm it just temporary use the Travelify theme instead of child theme on your site. If everything works fine then it’s your child theme issue so just share me your child theme so that i can troubleshoot it.

Kind Regards,
Movin