Ah I see what you're saying Tony.
I actually (and a friend also) found and extensively tested this issue ~4 years ago and beat on Crestron about it (mercilessly as usual!). My recollection is that they did fix this with the latest firmware.
Also, I think part of the issue is resolved when you use the LINKSTATE extender on the Gateway module. If you're not using this, the unit definitely will not let the system know when it comes back online, at least until a new transition...
Let me know it that works for you...