[bug] Notification list shows duplicate results on first open

I noticed that if I open the notifications dropdown immediately after a full page refresh, I see items twice. But then after closing and opening it I see the item only once. Unfortunately I can't upload a video screen recording (nudge nudge) but here are some still frames from the video:

Initial state, before clicking the dropdown.

After clicking, the loading placeholder appears.

After a moment one result shows.

❌ After another moment a second result shows.

Then I click the button to dismiss the popup.

I click it again to open, and see the loading placeholder again.

After a moment one result appears.

✅ Waiting longer, no other items appear.