Hello Shushant,
As per my understanding the restart for the replication of the table would be required, as once you define the ranges and start the replication system will first execute the pre-calculation job which will create a plan for execution of the table as this job run in a interval it might not pick up the new changes. thus restart would be required or preferable.
Also restarting the table replication wont take the same time as the data os already avialable in HANA also as per me it has that pointer from where it will do the next steps of load.
Please let me know you feedback on same.
Amar ghuge