Can Not Import Data to a Form with Script in On Add > Validate Form Action

Can Not Import Data to a Form with Script in On Add > Validate Form Action

Hi,
I tried for an hour this morning to import data into a Form. Nothing worked, I kept getting errors with no error messages. 

I finally decided to remove all deluge script from the Form's Action: Validate and the next import I did worked as expected!

This confuses me, does this mean the Form's Actions are run when importing data? Or is this a bug?

To summarize: How can I import data to a Form that has a Validate Form Action in place? 

Thank you!

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