Playing modded minecraft on my server with no mods which affect flight or elytras (except for Trinkets). When entering flight with the elytra I cannot use a firework to take off (characters hand moves as if they are trying to use a firework but no fireworks actually get used). Additonally my character ends getting stuck in this broken flight mode and cant stand back up without pressing shift and I keep sliding across the floor as if I am flying. Game works prefectly fine in singleplayer, just on my server it seems to be broken.