EB Menu Item - Manage Registrants - Loose buttons when scrolling

We use manage registrants menu to check people in for our events.
Most of our events have 40 - 60 people 
When we bring up the menu item, if we scroll down we loose the buttons at the top such as Check in. This means if we scroll down to select a registrant, we have to select it and then scroll back to hit the button. Is it possible not to lose the buttons when scrolling? See screenshots
Before Scroll
 
After scrolling, buttons not visible
 

Hi David

Could be something from the template here. Could you please switch that menu item to Joomla core template to see if the issue still happens?

I just want to narrow down the to see what's the actual reason of this issue here

Regards,

Tuan

Hi Tuan,
I assigned the default Joomla 4 template Cassopedia to the menu Item and I got the same result. See screenshots. Exactky same problem, the buttons disappear on scrolling.
Kind regards
David
Before Scroll
 

---

After Scrolling
 

Hi David

For this, could you please submit a support ticket sending us super user account of your site and link to that page

I will have my template developer to look at it and get it sorted for you

Regards,

Tuan

Thanks Tuan,
Support Ticket  #137594 created
Kind regards
David 

Thanks David. Sunday evening here, so my template developer will check it on tomorrow morning

Regards,

Tuan