NIFI ListSFTP 2.1.0 only run once

[#1]

I am using NiFi ListSFTP 2.1.0 to scan files in the root directory of an SFTP server. The Listing Strategy is set to Tracking Timestamps, and the Remote Poll Batch Size is set to 5000. There are over 10,000 files on the server, and each file has a timestamp. The processor only outputs 1000 files during its first run, but subsequent runs do not list the remaining files. However, with the same configuration, ListSFTP 1.9.1 works as expected. Why is this happening?

[#2]

@lexieliu 
It may be helpful if you can share the complete configuration of your ListSFTP processor including properties and scheduling tabs.

Thanks,
Matt