NFS issue with Kodi network drive



Hi everyone, this is my first time on this forum. 
I have Kodi installed on my Sony Bravia TV.
It automatically updated from v19 to v21 a couple of months ago.
Since that upgrade, every time that I try to access my nfs network folder (mybooklive), the loading hang forever. It works fine with my smb (Windows).
The trick that I found is, when I open the nfs folder, I unplug the network from my tv and plug it back. That crash the initial load but the next time I try to access the nfs folder, it works within 1-2 seconds.

Any idea what could be the cause of the issue ?

It was working fine before that.