I just checked you liked/thanked my post through admin. Also tested from both user and organization accounts. Thank you buttons are not working any where (Outline,Post and albums). So right now its only working for admin not for the users.
A suggestion : May be the notification can come in a hovering button ( like back to top button) on left or right instead of top. So when a user click it, it also refresh or take the user to that page. So for example there are 4 notifications. 4 hovering buttons will appear in vertical format each mentioning about each notification and they will disappear by clicking each one by one or 1 main button to dismiss all.