Webhook only works for 1st record added on Import of multiple records

There may be some difference in the output depending on the other service you are exporting to. What it does is take the bulk data and transform it into a CSV format allowing it to capture more the one record. CSVs tends to be compatible with a number of services but depending on the API that you are using with the other service it might not be set up to take a CSV of data. What service are you attempting to connect to? It is possible someone on the forum may be familiar with if a CSV format upload would work for that service.