ICX7250 Stack : DOT1x sessions gone until reboot

[stephan_schuste]

Hello Colleagues,

after updating our ICX-7250 devices to 08.0.90k, I'm noticing a strange behavior. Some days after a reboot of our Stack (3 devices), the dot1x sessions on all of the stack members, except the 1st one (the master), are gone. If I use the command 

show dot1x session all

I see only sessions of the first stack device (1/1/x). After rebooting the stack, all is back to normal and I see a much longer list of sessions, including ports of all 3 stack devices, as expected.

The log (show logging) shows me that the sessions where closed because of "port down" but the ports are up and also reconnecting a device (cable) is not able to bring the dot1x session back. It stays broken until the stack reboots. Single devices are not affected so far, maybe just because they are always #1 in there own single device stack and can't be affected.

Did anyone have the same issue and is there a firmware with a fix?

kind regards

stephan