replica_curr_items doesn't match curr_items in Magma YCSB runs

We see this issue in multiple Magma YCSB runs with build 7.1.1-3113. The number of replica_curr_items doesn't match the number of curr_items.

http://perf.jenkins.couchbase.com/job/magma-nvme-ycsb/2432/

Job: 2419, 2420, 2421, 2424, 2425, 2427, 2429, 2432

2022-06-06T22:36:38 [INFO] curr_items: 1500000000, replica_curr_items: 1497069172

We get these two numbers from bucket stats.

http://{}:{}/pools/default/buckets/{}/stats

curr_items = bucket_stats['op']['samples'].get("curr_items")[-1]

replica_curr_items = bucket_stats['op']['samples'].get("vb_replica_curr_items")[-1] 

Logs:

https://s3.amazonaws.com/bugdb/jira/qe/collectinfo-2022-06-06T215431-ns_1%40172.23.100.135.zip

https://s3.amazonaws.com/bugdb/jira/qe/collectinfo-2022-06-06T215431-ns_1%40172.23.100.136.zip

https://s3.amazonaws.com/bugdb/jira/qe/collectinfo-2022-06-06T215431-ns_1%40172.23.100.137.zip