@rstoenescu I found the issue. The problem was that I was giving the “.list” class a height of 100vh. Because of this, don’t know really why, de popover loses it’s anchor.
This also happens in your popover example with the “assignment” button.
In your example the the list displays a 20 elements and with a max-height of 500px. If you shorten the list to, for example, 2 elements the popover won’t lose the anchor. Also if you change the max-height to something like 200px you can preserve the amount of elements in the list without loosing the anchor for the popover.
Conclusion, big heights breaks the anchor position for the popover. Temporary fix? I think that setting the max-amount displayed to 3 or 4 elements in the autocomplete or giving a max-height of 200/300px to the list container inside the popover in the autocomplete component could solve it.