Set delay for tumbling window trigger on a pipeline - azure-data-factory

Question

I'm trying to create a tumbling window trigger to run every 1 hour and 10 minutes delay before the pipeline starts executing.
I created a test trigger with time interval of 5 minutes and delay of 10 minutes.
I expected the pipeline to run every 15 minutes (5 min interval + 10 min delay).
What I actually see in the Monitor section of the pipelines Runs and Triggers Runs that it runs every 5 minutes.
Isn't the delay should delay the pipeline execution?
Am I doing something wrong here?
Updated
Here's my trigger template:
{
"name": "[concat(parameters('factoryName'), '/trigger_test')]",
"type": "Microsoft.DataFactory/factories/triggers",
"apiVersion": "2018-06-01",
"properties": {
"annotations": [],
"runtimeState": "Started",
"pipeline": {
"pipelineReference": {
"referenceName": "exportData",
"type": "PipelineReference"
},
"parameters": {}
},
"type": "TumblingWindowTrigger",
"typeProperties": {
"frequency": "Minute",
"interval": 5,
"startTime": "2021-07-25T07:46:00Z",
"delay": "00:10:00",
"maxConcurrency": 50,
"retryPolicy": {
"intervalInSeconds": 30
},
"dependsOn": []
}
},
"dependsOn": [
"[concat(variables('factoryId'), '/pipelines/exportData')]"
]
}

Answer 1

I haven't found a concrete example and the docs are not very clear in terms for terminology.
From what I understand, when one trigger window finished running, the next trigger window starts running regardless of the delay specified.
According to the docs, "the delay doesn't alter the window startTime" which I assume means what I have mentioned above.