I don't know if this is the intended behavior because the help file does not discuss it. Therefore I don't know if I should consider this a bug or a feature.
If you specify Insert from Device on a container field in FM-GO to , let's say, insert a photo using the rear camera, and the user happens to cancel but the field remains active, a second tap on the same container field opens the default choices for container field inserts (signature, photo library, etc).
But if you commit the record, a second tap will repeat the action assigned to the button or script.
In my case, I have some users who like the feature because cancelling the camera allows them to choose a picture they already have ... but I'm not sure if this is accidental good luck or the way FM intends it to work.