Migrating from Pi 3 to Pi 3 B+ with network boot (NFS)

Hi. My setup was raspberry Pi 3 with a microSD for booting and the storage in a NFS server (Synology NAS) to avoid corruption. It was running Ok since the last months.

Now I want to move to the new Pi 3 B+. I just changed the microSD to the new raspberry and it doesn't boot:

sh: can't access tty: job control turned off

Should I change something in the cmdline.txt to make the new raspberry boot from the microSD but use the network to run?

If I place the microSD again in the "old" raspberry, it works as usual.

Edit: of course, I'm using the last 8.2.4 version

Thanks in advance.

Edit 2: it seems that the problem is that the nfs share is not mounted at the beginning.

Do you know if there is something different in the pi 3b+ from the previous model relating how the nfs share should be mounted?

In my cmdline.txt i have this :

disk=NFS=192.168.1.105:/raspberry/rpi2/

This configuration worked (and still works) with my “old” raspi 3

Could you please give me a hint?

Thanks

Thanks Hias!