Sometimes I see a notification flash on the screen or hear a partial ring or ding. Is that normal on an iOS device?

Yes. On an iOS Device, when a call or text comes in, TRUCE issues a command to dismiss the notification. Most of the time, it will be executed before ever being seen or heard. Occasionally, depending on what else the operating system is doing at the time, the command may be slightly delayed, and you may hear or see the notification for a split second. This is normal behavior on an iOS device and not something that TRUCE can control. You will not be able to interact with those notifications even if you are fast enough to click on it. TRUCE will foreground, and you will not have access to any apps/functions that are not allowable by your policy.