API Post Request to N8N Endpoint does not wait for Reply

I set an API Post request to N8N (the workflow fills in some variables and sends them back) but in the "Run Test Step" the Voiceflow API Call successfully sends a HTTP Post Request to N8N which takes about 2 seconds to process (and succeeds every time) but the API Post Request in Voiceflow just instantly moves on to the next field even though the call has succeeded and therefore the variables are returned with "0" "0"

Does anyone know how to solve this?