Rebalance of index took very long time to finish during rebalance in of upgraded node

During rebalance in of a index node after upgrade, index idx4 was stuck in replicating/move state for around 30 mins and then finished successfully. 

This is a really long time for index on just over 400k docs.

Cluster configuration - 3 kv node + 3 index nodes + 2 query node - in bi-directional XDCR with cluster 1 node with KV+Query+Index service

7.0.3 - upgraded cluster logs
https://cb-engineering.s3.amazonaws.com/UPS_RELATED/UPS/collectinfo-2022-07-28T091556-ns_1%40172.23.104.197.zip
https://cb-engineering.s3.amazonaws.com/UPS_RELATED/UPS/collectinfo-2022-07-28T091556-ns_1%40172.23.105.17.zip
https://cb-engineering.s3.amazonaws.com/UPS_RELATED/UPS/collectinfo-2022-07-28T091556-ns_1%40172.23.105.232.zip
https://cb-engineering.s3.amazonaws.com/UPS_RELATED/UPS/collectinfo-2022-07-28T091556-ns_1%40172.23.105.233.zip
https://cb-engineering.s3.amazonaws.com/UPS_RELATED/UPS/collectinfo-2022-07-28T091556-ns_1%40172.23.106.21.zip
https://cb-engineering.s3.amazonaws.com/UPS_RELATED/UPS/collectinfo-2022-07-28T091556-ns_1%40172.23.106.22.zip
https://cb-engineering.s3.amazonaws.com/UPS_RELATED/UPS/collectinfo-2022-07-28T091556-ns_1%40172.23.106.23.zip
https://cb-engineering.s3.amazonaws.com/UPS_RELATED/UPS/collectinfo-2022-07-28T091556-ns_1%40172.23.106.28.zip
6.5.1 - cluster logs -

https://cb-engineering.s3.amazonaws.com/UPS_RELATED/UPS/collectinfo-2022-07-28T091634-ns_1%40127.0.0.1.zip