Issues With Sed In Shortcuts

Running this in iOS Shortcuts Execute Command (run in app option selected)

pbpaste | sed -e 's|..*/file/||g' -e 's|^|https://api.example.com/v1/|' -e 's|$|/request.json|' | pbcopy
open shortcuts://

makes a-shell just return to the prompt (also without the pbcopy). Manually running this command in the app works fine, but using a shortcut it doesn't, and the return to shortcuts as the following command also never gets executed.