please go to the SCORM in Moodle web, edit the settings and check the "Auto-update frequency" setting. This affects how often does the app download the ZIP. Which value does it have?
we noticed a problem that caused the SCORM file to be downloaded when it shouldn't in Moodle 3.2 (or Moodle 2.8+ with the Moodle Mobile Additonal Features plugin installed). We opened an issue to fix this:
Once this is fixed, the user will see the refresh icon if he generate some data in the SCORM, but the SCORM package will only be downloaded if it has been modified.