Shortcut with take photo doesn’t repeat when run by voice to Siri

Newbie W. I want to snap 4 photo’s completely hands free with back camera and then compile as shown and save. Works by pushing shortcut button but fails to repeat when activating by Siri - takes one photo only. Completely hands free so o can just point as it shoots while skiing

https://www.icloud.com/shortcuts/70449ecc5b7d412287d9f7f5a5c325dc