Behavior when one of the line is cancelled in shipment set

Summary

Behavior when one of the line is cancelled in shipment set

Content

There is a sales order which has 2 lines in shipment set. the lines are still not interfaced to Shipping.

Created a revision and chose to cancel 1 line.

Expectation 1: since both lines are in shipset, both will be cancelled ?

Expectation 2: the cancelled line would exit from shipment set

Which is a valid expectation ?