Connecting to local SMB share very very slow

Hi,

I used to connect to an SMB share on my local Unraid server and watch videos using that and it was super quick. For some reason, in the past few months, it has suddenly got super slow. Fetching the folder lists is slow, fetching the file lists is slow and then when they finally load, tapping a file, it takes ages before it starts to play.

I try connecting using the Files app and it's super quick.

Any ideas?

Thanks, Neil