Motorola Photon 4G :: Why Does "updates Available" Icon In Notification Bar Go Away

Why does the "Updates Available" icon in the alert notification bar disappear if it isn't selected immediately? And once it's gone, how can I get it back? (This applies to all types of updates: Android system, service provider's software, and installed apps). The Android User Manual seems to address only relatively simple update-related questions, and I'm not sure whether this notification behavior is a general Android system characteristic, or just unique to Motorola phones, or only to the Photon.

Often, it's not practical or convenient to drop everything else and install updates immediately when the notification appears, e.g., if you're on a phone call, in the middle of writing a somewhat urgent text or email, changing the baby's diaper, etc. The user might especially want to wait until later to download and install updates that are quite large and time-consuming and those labeled "manual," which seem to require monitoring individually in order to accept terms of service, etc., vs. just being able to select "install all."because some of the updates are large and time-consuming, I'd like to be able to turn on 4G or wireless, if they're not already on. (And they usually aren't, to conserve battery power, as recommended by "Remy" in his excellent post on "Android Tips & Tricks.") But at least on the Photon, turning on 4G or Wireless often causes the update icon to disappear, and there doesn't appear to be any way to get it back.

True, the "My Apps" section of the Android Store supposedly tells you which apps have available updates, but it's much more time-consuming to have to connect to the store and check manually instead of just selecting the icon in your notification bar. Also, the App Store won't have info about system updates.BTW, even when you select "install all," you still need to monitor the installation closely. When the update process finishes, you usually get some notification, like "Updates successfully installed." But if your screen has timed out and is off when the update process finishes, you don't get any information about the updates, so you don't know whether they all installed successfully. (Maybe if your screen is off, you only get a notification when an update isn't successful -- but there's no way of knowing that until it happens!)