Dynamic field request spam

We have a hidden Trigger in our app, which is used to form a dynamic field in another Action event. 

As I understand, the default logic is this:

1. User starts to create a new Zap
2. he chooses some Action event with a dynamic field in it
3. user presses continue on a Setup step
4. On a configure step Zapier sees a dynamic field and calls our API /get_dynamic_field endpoint to get data for the dynamic field
5. Zapier shows the Configure step to the user and draws dynamic form for user to map data.

So usually this API endpoint /get_dynamic_field called once or twice, which is normal behavior when user manually creates a new Zap or edits existing one.

But we have some anomaly in our logs recently. We have intervals when this API endpoint /get_dynamic_field is requested like every second for an 1-2 hours, which looks more like automated behavior.

I don’t know why and how this is happening. Is there a way for a user to somehow spam Hidden trigger? Is it possible to automate Zap creation, so Zapier itself tries to spam this endpoint?

Thanks.