1.Create a lineage as attached in the screenshot (i.e) tag propagated from a source using 2 processes to a target
2. Add a tag to t3 , now the tag is propagated to t4 via both process1 and process2.
3. Now block the propagation from t3 to process1.
4. Expectation is that , tag will be propagated via process2 to t4. But the propagated tag is removed from t4