nfs_automount

[EAlthuis]

On the nfs server the shares (whole partitions) are mounted to /export using the "default" options.
Nfs_automount on the client then mounts these to /media in rw mode.
works fine.
Hoever when I on the server make changes to the files in the mounted partition, such as deleting, moving etc. the partition seems to be unmounted, as the client fids it that way. When I quit messing with the partition it does not become available to the client again.
I do not have that problem with other clients that still mount the partitions through their fstab.

What can I do??
I do have some sections of the log file:
20160214_NFS_automount log.pdf