M4300: "no autostate" leads to Slot Status "Empty"?!

Hello Netgear community!

Any help regarding this strange issue is greatly appreciated!

If we add "no autostate" to an VLAN interface to keep it up regardless of physical links, everything behaves like it should. But after rebooting with this desired config, no single regular port of the switch can establish a physical link anymore and can only be accessed by the OOB-Ports. Best of it: the "Slot Status" of the (fixed) switch card shows "Empty":

Here the minimal config to reproduce the behaviour:

!Current Configuration:
!
!System Description "M4300-52G ProSAFE 48-port 1G and 2-port 10GBASE-T and 2-port 10G SFP+, 12.0.2.17, 1.0.0.8"
!System Software Version "12.0.2.17"
!System Up Time          "0 days 0 hrs 7 mins 3 secs"
!Additional Packages     QOS,Multicast,IPv6,IPv6 Management,Stacking,Routing
!Current SNTP Synchronized Time: SNTP Last Attempt Status Is Not Successful
!
vlan database
vlan 100
vlan name 100 "Test"
vlan routing 1 1
vlan routing 100 2
exit

configure
stack
member 1 3
exit
switch 1 priority 1
slot 1/0 3
set slot power 1/0
no set slot disable 1/0
line console
exit

line telnet
exit

line ssh
exit

!

interface vlan 1
routing
ip address dhcp
exit



interface vlan 100
routing
ip address 192.168.2.1 255.255.255.0
no autostate
exit


router rip
exit
router ospf
exit
ipv6 router ospf
exit
exit

If we remove the "no autostate" by setting just "autostate" after the reboot the Ethernet-links work normal.

(another interesting point is, that the CLI Reference states "By default, AutoState is disabled, which means that a VLAN routing interface could remain up even if the link is down." which ist according to "show running config" not the case)

And also the switch card ist detected, like one would expect:

Can anybody explain what is going on here?? For me, it looks like a bug, but I have not too much experience with these switches.

Thank you for your inputs,

GH