If
you're using Linked Parts, it is recommended to use Staff Lists to assign
Repeat Endings and Repeat Text instead of unchecking "Repeat Endings
and Text Repeats" in Staff Attributes.
Most
often, the "Top Staff" radio button will be sufficient. This
will place the Repeat Ending or Text Repeat on the top staff in the Score
and in the top Staff of all Linked Parts.
If
you need the Repeat ending to appear in some, but not all staves in the
Score. Or, if you need them to appear in some but not all staves in each
Part, then use a Staff List.