Filebeat reading logs repeatedly

I am deploying filebeat on a Linux server to manage logs on a webdrive mounted. Filebeat read the logs and send the content to logstash repeatedly, generating duplicated content. The frequency of each line appearing is almost the same.
The filebeat config is:

The same config works well for filebeat on windows, and no duplicate log is produced. Should I add some Linux-specific setting? Thank you for your help!

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