@alexmesfin, while I am not using NFS shares and am not very knowledgeable in that space, we probably need a little more information on this.
Have you come across this thread?
While there is no conclusive resolution stated in there, it can help you gather some additional information. You might be the unlucky “reproducer” for this issue that @phillxnet was looking for. Or, a much more optimistic outlook, it might help get to the bottom of your particular problem.