When you lift or extract an element that is part of a dissolve or wipe, the dissolve or wipe either stays attached to the lifted or extracted element or remains attached to the record element depending on your preferences. In the Transitions section of the Preferences menu:

• Disable Link on Extract/Copy to have the associated dissolves remain on the timeline.
• Enable Link on Extract/Copy to lift the associated dissolves with the element that is lifted. The Link Transition button on the timeline must also be enabled.