AdNetworkType1 and AdNetworkType2 returning empty results in CAMPAIGN_PERFORMANCE_REPORT

Hi,

I was using the CAMPAIGN_PERFORMANCE_REPORT to pull campaign ids and their names. 

I added the fields AdNetworkType1 and AdNetworkType2 to my select statement.

For one Adwords account it successfully returns correct data, but for another it's returning empty results. If I remove the AdNetworkType fields, both accounts will successfully return data.

I'm just wondering if there was a reason for this. I can't see why both accounts wouldn't return data.

api version: v201607

Warm regards,

Carl Adermann

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