I tried this tonight, I have the iEQ45 v2 AZ with the 8407+ handset and running Nov 13 firmware and ASCOM driver 2.4.
Did 3 flips only one of which worked successfully (though manual intervention required).
You set the mount to continue tracking but the hand controller still puts up a message saying meridian reached, enter to flip or back to continue. I hit back the first time and the flip completed successfully.
I then tried without hitting the back button, the flip started ok but failed - further investigation showed that the com ports been disconnected, no mount information was present in SGP or PHD2 - both had to be closed and restarted before I could connect to the mount (or any other USB device) again.
I had seen this before, when the mount goes though a long slew it seems like the ASCOM driver fails in some catastrophic fashion crshing the USB hub in the process. I though this was an issue with my setup and re-jigged everything and have replaced everything, new hub, cables PC (local Intel NUC next to the mount) etc. The only solution was disconnect and reconnect the hub so regain communication.
As the PC is next to the mount I then plugged the USB to Serial converter directly into the PC and ran a sequence again that would result in a flip, did not touch the controller and though it got further is completely locked up SGP which could only be closed by killing in task manager.
I use Windows 8.1 and the both the NUC and the Hub I use are USB3 so this maybe a USB2/USB3 compatibility issue as I suspect I would have seen reports of the problems I am seeing if this was more widespread.
I would look at a mount upgrade against any form of upgrade to you current mount, the CEM60 looks to be a good mount and was what I was going to get before a 2nd hand Paramount MX came up.
There was talk of an upgrade being available for some of the older iEQ45 mounts to the Pro version, this may be an option as will use the new control boards, firmware and ASCOM driver which address a lot of the issues with the previous mounts/ASCOM driver.
I was hoping that the changes made in the CEM60/iEQ45 Pro ASCOM driver would find there way into driver for earlier models, maybe they will in time though reading between the lines the older hardware may not be capable - hope I have read that wrong.