Trigger Dataverse: "When a row is added, modified or deleted (preview)" starts multiple times

Isabell Gloetzinger 0 Reputation points
I have a PowerApp with the data source Dataverse. 
There is a workflow that when a person applies to a task, an email is sent. 
This is triggered by the Dataverse trigger "When a row is added, modified or deleted (preview)". It is triggered when a new row is added to the "Application" table. 
However, the trigger is fired multiple times when a row is added. 
The output of the trigger differs as follows: 
Run 1: 
    "headers": {
        "connection": "keep-alive",
        "expect": { "100-continue",

Pass 2: 
    "headers": {
        "expect": "100-continue",

--> The first pass specifies a connection, the 2nd pass does not. 

How do I make the workflow trigger only once? 

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