High CPU after bulk insert


We have recently observed an issue with our 3 node cockroach cluster, where CPU usage of one of the node is very high after a bulk insert activity (around 40k records) in one of the table. This table has a sequence number as primary key. After the insert, following are the ranges and lease holders:

After the bulk insert, CPU usage of Node 1 is ~80% and the number of active distributed queries also high.

CPU profile of the node which has high CPU usage:

Appreciate any suggestions on what could cause the issue high CPU after adding more data?