I am having texture issues with some of the falling blocks

In the Minecraft server I'm playing on I am having texture issues with that dragon egg block and anvils when falling. The dragon egg's texture is changed to a coco bean and the anvil texture is changed into a light gray stained glass pane. I don't have any resources packs on and the server I am on has none either. From what I know about it it seems to only happen when you are in a server