STEPS TO REPRODUCE
1. Launch iClone 6
2. Import prop Dog - Greyhound to program
(http://city.reallusion.com/ContentPreview.aspx?i=JICc8f27ac73fbcf2645)
3. Pick the prop, right-click and select “Perform > loopEating01”
4. Open Timeline > Dog – Greyhound > Collect Clip, select Frame 50 to 70, right-click and choose “Add to Perform”
5. Pick prop, check the right-click menu

ACTUAL RESULT
Perform item disappears

EXPECTED RESULT
Perform item won't disappear

NOTE
Same issue also reproduced in iClone 5