Issue with Billboard GUI buttons not working consistently

I want to resolve an issue with the buttons in my Billboard GUI that only work sometimes and ensure they work consistently.

I have created a Billboard GUI with buttons that are supposed to trigger specific actions when clicked. However, the buttons only work sometimes and are not consistent in their functionality. I have attached a video demonstrating the issue.https://gyazo.com/d9923728727627e7ccaf960536f84a01

I have tried troubleshooting the issue by reviewing my code and ensuring that it is correctly written. I have also looked for solutions on the Developer Hub, but have not found any that address this specific issue. I have also tried adjusting the placement of the buttons to see if that would affect their functionality, but it did not help.