How to solve the memory leak issue when using HTTP Server?

[catdingding]

HTTP Server source with larger throughput will cause memory leak (in my case the QPS is about 3k~5k)
The memory cost increases to 10 GB (then crashes) in one hour and never release.

I think it's caused by HTTP Server source since the problem is still there after I removed the VRL and replaced the ClickHouse sink with File sink.

OS: Ubuntu 20.04.2
Version: 0.25.1

config

[api]
enabled = true
address = "0.0.0.0:8686"

[sources.vdc]
type = "http_server"
address = "0.0.0.0:80"
encoding = "binary"
method = "GET"
strict_path = false
path = "/vdc/v1.0/"

[transforms.vdc_transform]
type = "remap"
inputs = ["vdc"]
drop_on_error = true
source = """
del(.message)
data = split!(del(.path), "/")
.so = to_int!(data[3])
.stb = data[4]
.service = to_int!(data[5])
.datetime = to_int(to_int!(data[6]) / 1000)
.timestamp = to_unix_timestamp!(.timestamp)
.server_datetime = del(.timestamp)
"""

[sinks.vdc_ch]
type = "clickhouse"
inputs = ["vdc_transform"]
database  = "vdc"
endpoint = "http://xxxxxx:8123"
table = "vdc_log_entry"
compression = "gzip"
skip_unknown_fields = true

  [sinks.vdc_ch.auth]
  user = "xxxxxx"
  password = "xxxxx"
  strategy = "basic"

  [sinks.vdc_ch.batch]
  timeout_secs = 1

  [sinks.vdc_ch.buffer]
  max_size = 268435488
  type = "disk"