RB1100AHx2 crashes after IPSec login try

Dear readers,

we run a RB110AHx2 with about 120 XAUTH IPSec users. Everthing is good, most of the IPSec Clients are Fritz!Boxes. But if one specific client is in the /ip ipsec users list and does a login, the Router crashes and does not respond to anything anymore. A reboot fixes the problem until the next login is done with crashing the router again. Ethernet-Ports which have “Master-Port” assigned, keep still working, so I think it’s the CPU that crashes. Please tell me what more information or logs you need to track this bug down.

ROS Version 6.33.3 and 6.33.5 are both affected.

Thank you
Ralf Wilke