Your ArcGIS Online organization has a limit on how many requests can be made to it within a minute. A request may incur 0 to 3 request units, depending on a few factors, but primarily if it reaches the database. Cached requests, no geometry, non-editable requests are all lighter.
When you reach this limit across all services in your org, a 60 second timeout to all services in your organization is introduced.
It's unlikely that a survey pulldata function is maxing out this threshold. Do you have calculate=always? Can you share the XLSForm? Are you seeing this issue when the survey is not in use?
It's more likely that another workflow is causing a lot of requests e.g.:
- You are using scripts or automated tools to make a lot of requests to your organization feature services
- You have a public, viral application
- You have a lot of users
- Anti-practices are present in your environment that may combine with the above
Now testing your survey should be easy - if your org is health when the survey is not available or in use, then it's the survey. Otherwise I'd recommend taking a read of this article:
https://www.esri.com/arcgis-blog/products/arcgis-online/data-management/tracking-your-premium-featur...
And you may need to investigate your layers by usage count, content, workflows, etc. If you can't resolve the issue you'll need to consider a premium data store to increase your limit.
