Gitlab Runner signal:killed macOS

Hello, I have a problem with my gitlab runner. Sometimes this error occurs, and if you try to restart the job several times, the runner works again. The config.toml I use you can see below. The gitlab runner is running as a service on a macOS 11.1

concurrent = 1
check_interval = 0

[session_server]
  session_timeout = 1800

[[runners]]
  name = "Gitlab-Runner on MacOS"
  url = "..."
  token = "..."
  executor = "shell"
  [runners.custom_build_dir]
  [runners.cache]
    [runners.cache.s3]
    [runners.cache.gcs]
    [runners.cache.azure]