Shardding Warnings ConflictingOperationInProgress

Seeing the following sharding warning frequently in the logs.

We have a Mongodb 4.0 setup with 16 replica sets and they are setup in a PSA architecture. This is the only collection showing this error.

2021-04-22T15:59:20.526+0000 W SHARDING [conn7391181] Chunk move failed :: caused by :: ConflictingOperationInProgress: Unable to start new migration because this shard is currently receiving chunk [{ _id.m: ObjectId(‘56e1f3bd181d1342e1f59a90’) }, { _id.m: ObjectId(‘56e1f3f7181d1342e1f5aaa5’) }) for namespace customer.product from replica11