I am running into an issue where my aftersubmit script is not running or being executed at all for sitebuilder checkouts but works perfectly fine for sales orders generated in Netsuite. Is there a fix to this besides creating a scheduled script to look for sales orders? - I have all execution contexts selected besides "Web application"

Make sure “Webstore” is selected at the context filtering tab on your script deployment.

There may be an event that is throwing an exception, preventing the following events to not run. Check other User event scripts and workflows.