When creating multiple entries in Level 2 Sub object in the Modern User Experience (UX) the values of the parameterized lookup which were added disappear.
The values are saved, but when you click on the "+" symbol to create a new one they don't show up.
Release : 15.9.1
Component : CLARITY STUDIO
This is reported as DE61267.
This is fixed as part of 15.9.2 Patch 1 and 15.9.3
Workaround: The values are not lost. When you refresh the page they are displayed.
See also: Lookups master KB for Clarity