Yes the exact same thing is happening to me. The only objects the display properly it seems is; Armor, mobs, chests, ender chests, trapped chests, the GUI's of chests and stuff, the statistics, esc pause screen, option screens and the main menu.
If your server is experiencing issues with the fireworks you can load the map on single player. This will make the firework despawn and will allow you to rejoin the server. If that doesn't work open the world in mcedit and delete the fireworks entity.
Yes the exact same thing is happening to me. The only objects the display properly it seems is; Armor, mobs, chests, ender chests, trapped chests, the GUI's of chests and stuff, the statistics, esc pause screen, option screens and the main menu.