Exe sensor is displaying extra data about average msec

I have an exe sensor that is returning extra data on the status line. When I run the script from the PRTG server's command line I get the expected result:

1566:2018/12/19_14-05-24

https://i.imgur.com/oe4vWw1.png

However what is being shown in PRTG is:

1 hour interval average of 521 msec (Execution Time) is unusually high for this hour of the week (2018/12/19_14-05-24)

https://i.imgur.com/cWD8isC.png

The problem with this is it makes my custom object on my map look awful and it covers up other data:

https://i.imgur.com/nNb4zOe.png

This is the custom map object that displays just the status message:

<!--JLB Icons: Sensor (message only, transparent background)-->
<div class="map_object map_icon2 map_icon_large mapicon_status_transparent" id="<@itemid>" objectid="<@objectid>" subid="<@subid>" style="<#mapobject type="coordinates" subid="<@subid>" mode="<@editmode>">">
  <#mapobject type="objectgrip" mode="<@editmode>">
  <#mapobject type="htmlbefore" subid="<@subid>">
  <#checkobjecttype objecttype="sensor" nicemessage="true" id="<@objectid>">

  <div style="clear: both;"><#objectstatus name="message" show="textraw" id="<@objectid>"></div>

  <#mapobject type="htmlafter" subid="<@subid>">
</div>

What can I do to fix this so the extra data is not shown? I only want what the custom sensor returns.

custom-sensor exe-script-sensor map-objects prtg