Bug with new screens

I am building a portal in which starting from the same data item will show 3 different pages.

The first page is the tab page, and I have a Button List component with 3 buttons.

The first one redirects to the tab page, the second one opens a new screen with a different view of the same item, and the third one opens another different view of the same portal.

I copied the Button List element in the screen of the other 2 pages, but when I start clicking on the buttons within those pages it appears that the buttons component disappears after a few hops.

Let’s say I have page A, B, C and buttons A, B, C.

If I click to B, then I click to C, then again to B, at that point the buttons I originally copied are not there, and at times the whole page is empty.

Is this a known bug?

By Button List, I think you meant Button Block?

So you have a tab level, and two “new screens” of the same data item that you want to show a user? And they should always be able to alter their view of the data item using your buttons?