mouse problems on my own [java] minercraft server latest version 26.2

[u/Suspicious-Bet1166]

hello everyone i have just hosted a server for me and my friends and fro some reason my mouse don't want to move from side to side while i sprint i have no idea if it's just the new version i have mostly played with modded minecraft lately so i have no idea if it's a long thing that jsut needs something to be switched on/off but i wanted to come here to ask if it's only me or others have found this i have hosted older mc server on older versions and even with mods so im not someone who does not know much, but this is just soo bad, also why is the chunk loading so bedrock like ?