@Bridewin 
I two things you may want to try....

1. GetFile processor was deprecated in favor of the newer ListFile --> FetchFile processors.  I'd recommend switching to these processors and see if you have the same observations.

2. I'd suggest enabling debug logging for the GetFile processor class to see what additional logging may show.  To do this, you would modify the logback.xml file in NiFi's conf directory. Add the below line down in this file where you see similar lines already.

<logger name="org.apache.nifi.processors.standard.GetFile" level="DEBUG"/>

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Thank you,

Matt