trunk on N1148T-ON stack

Hi, I have a problem with 2 stacked N1148T-ON switches.

I want to connect a N1108T switch to the stack.

The N1108 is configured and working in port gi1/0/1 on the N1148 stack, but not in gi2/0/42 in the same stack.

The ports are both configured with the same vlans, pvid and in trunk mode. In gi1/0/1 traffic is working as excepted on the client ports. And I can ping, https and SSH to the N1108.

In gi2/0/42 the only thing that is working is that I can ping the N1108. If I try and SSH the command hangs. I never get a username prompt. The same for https. nmap says port 22 and 443 is open.
I can't get any DHCP IP on any vlan.

show interfaces detail gi1/0/1 and show interfaces detail gi2/0/42 show no difference except for port number and port id.

lldp shows the switch on both ports.

I have rebooted the stack, and the N1108.

The stack is running firmware 6.4.2.6

What could be the problem?

Thanks

Tommy