Why does Log4Net sometimes add a property. to properties in the logs, but sometimes it doesn't?

An example line from my log might look like this:

{"date": "2015-05-20T16: 33: 52.2825750-05: 00", "level": "INFO", "Node_name": "sitenamehere", "logger": "loggergoeshere", "thread": " 6 "," property.ApplicationName ":" AppnameWithPrefix "," property.Username ":" USER "," property.log4net: Identity ":", "property.EnvironmentName": "local", "property. log4net: UserName ":" USER "," property.log4net: HostName ":" HOST "," message ":" MassTransit v2.9.2 / v2.9.0.0, .NET Framework v4.0.30319.34209 "," ApplicationName " : "AppnameWithoutPrefix", "EnvironmentName": "local", "username": "USER "}

Basically, at the beginning of the line ApplicationName

and EnvironmentName

are prefixed with "property". and I would like to get rid of that. For some parts of this application (in particular, web content), the prefix is ​​not displayed. I can't figure out what this does.

Conversion sample

<appender name="FileAppender" type="log4net.Appender.RollingFileAppender">
    <file type="log4net.Util.PatternString">
      <conversionPattern value="%env{SPOTLITE_LOG_DIR}\%property{ApplicationName}\%property{ApplicationName}_%property{EnvironmentName}_%date{yyyy-MM-dd}.log" />
    </file>
    <appendToFile value="true" />
    <rollingStyle value="Date" />
    <layout type="log4net.Layout.SerializedLayout, log4net.Ext.Json">
      <decorator type='log4net.Layout.Decorators.StandardTypesDecorator, log4net.Ext.Json' />
      <default />
      <!--explicit default members-->
      <remove value='message' />
      <!--remove the default preformatted message member-->
      <member value='message:messageobject' />
      <member value='ApplicationName' />
      <member value='EnvironmentName' />
      <member value='UserName' /> 
      <!--add raw message-->
      <!--add raw message-->
    </layout>
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
  </appender> 

  <appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender,log4net">
    <mapping>
      <level value="FATAL" />
      <foreColor value="White, HighIntensity" />
      <backColor value="Red, HighIntensity" />
    </mapping>
    <mapping>
      <level value="ERROR" />
      <foreColor value="White" />
      <backColor value="Red" />
    </mapping>
    <mapping>
      <level value="WARN" />
      <foreColor value="Yellow" />
    </mapping>
    <mapping>
      <level value="INFO" />
      <foreColor value="Green" />
    </mapping>
    <mapping>
      <level value="DEBUG" />
      <foreColor value="White" />
    </mapping>
    <layout type="log4net.Layout.PatternLayout">
      <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
    </layout>
  </appender>