It looks like you already have 4.5.1, 4.5.2 was actually just released, but I wouldn’t expect it to have an effect. Firmware update details are found here.
That sounds like the panel might be losing power intermittently. First make sure it is not plugged into a switched outlet. This can be a cause of similar behavior.
If the outlet is not switched, unplug the transformer and make sure the wires are secure and not loose. Make sure the barrel connector at the IQ Remote is fully pushed in.
Is it just plugged in nearby or was the wire extended? If so what gauge wire was used and how long is the wire?