Inconsistent results for each query

I query multiple times, but the results returned each time are inconsistent

auth_enabled: false

server:
  http_listen_port: 3100

schema_config:
  configs:
  - from: 2022-05-06
    store: boltdb-shipper
    object_store: filesystem
    schema: v11
    index:
      prefix: index_
      period: 24h
    chunks:
      prefix: chunks_
      period: 24h

storage_config:
  boltdb_shipper:
    active_index_directory: /a8root/work/service/loki-new/boltdb-shipper-acitve
    cache_location: /a8root/work/service/loki-new/boltdb-shipper-cache
    cache_ttl: 24h
    shared_store: filesystem
  filesystem:
    directory: /a8root/work/service/loki-new/loki/chunks

compactor:
  working_directory: /a8root/work/service/loki-new/boltdb-shipper-compactor
  shared_store: filesystem
  retention_enabled: true
  delete_request_cancel_period: 168h
  deletion_mode: filter-and-delete

limits_config:
  query_timeout: 5m
  max_cache_freshness_per_query: '10m'
  split_queries_by_interval: 1h
  enforce_metric_name: false
  reject_old_samples: true
  reject_old_samples_max_age: 168h
  max_query_series: 10000
  max_query_parallelism: 32
  per_stream_rate_limit: 500MB
  per_stream_rate_limit_burst: 1000MB
  ingestion_rate_strategy: local
  ingestion_rate_mb: 150
  ingestion_burst_size_mb: 200
  allow_deletes: true

frontend:
  log_queries_longer_than: 5s
  compress_responses: true

ingester:
  lifecycler:
    ring:
      kvstore:
        store: memberlist
      replication_factor: 3
    final_sleep: 0s

querier:
  tail_max_duration: 10m
  extra_query_delay: 5s
  engine:
    timeout: 30m
    max_look_back_period: 300s

memberlist:
  join_members: 
    {{$JOIN_MEMBERS}}
  abort_if_cluster_join_fails: false
  bind_port: 7946

chunk_store_config:
  max_look_back_period: 168h
 
table_manager:
  retention_deletes_enabled: true
  retention_period: 168h