Only three rows are shown for multi-row variable set on RITM and SC task form. Any new rows added to the variable set on RITM and SC task form are not visible.
we can see all the rows added by inspecting the variable set element on browser tools.
This issue is caused by List V3.
The following problem has been created to address this issue:
PRB1352911 Variable Editor only displays three records of a multi-row variable set when List v3 is active
As a workaround please use list v2. Follow below steps to disable List v3 globally