CSV Import execution context in user-event scripts

The execution context of user-event script is affected by CSV Import preference.
Using Administrator role navigate to Setup > Import/Export > CSV Import Preferences, check setting for "Run Server SuiteScript and Trigger Workflows".

If this preference is enabled (checked), then user-eventscript is triggered and all three events (beforeLoad,beforeSubmit and afterSubmit) are executed and thecontext is csvimport.

If the preference is disabled, the user-event script gets alsotriggered, but performs only actions defined in the beforeLoadfunction - and with context userevent.