I have not yet opened the case with TAC but just wanted to confirm that a rollback to firmware 3.4.0.3 has resolved the reboot issue. As in we dont see any reboots anymore.
There is without a doubt an issue or two with 4.0.0.1, possibly related to load since we have a second site running a similar setup on 4.0.0.1 and have not seen any reboots. Could also be a combination of load + Client Match
Thanks,
Serge