Single updates, upserts, and single deletes are required to target a single shard or have an exact match on the _id. For (non-replacement-style) updates and deletes, the ChunkManagerTargeter checks that the query contains an exact match on the _id using the collection-default collation, or an exact match on the shard key using the simple collation. This is done using extractShardKeyFromQuery. However, we fail to extract the shard key / _id when there is an exact match in every branch of an $or. Then we are unable to perform the write. We should be able to extract the shard key / _id when there is an exact match in every branch of an $or.