Server list icons use the default icon for a split second

Whenever you refresh the server list, the icons get set to the default icon for a split second then changes back to the actual icon. This also happens when you move the server up or down the server list

Steps to Reproduce:

Refreshing server list:

1. Add servers with icons to your server list (e.g. hypixel.net)
2. Hit the refresh button
   The icons turn into the default icon for a second then turns back to the correct icon

Changing position of server on the server list:

1. Add multiple servers to your server list (or add the same server many times)
2. Move a server up or down the list.
   The icons turn into the default icon for a second then turns back to the correct icon