storybook: storyshots: Unexpected loaded state. Did you call `load` twice?

Describe the bug I have a setup using storyshots / storyshots-puppeteer and I want to make a screenshot of a story on multiple devices. When I execute the code I receive a warning.

Unexpected loaded state. Did you call load twice?

Expected behavior No warning.

Screenshots

Code snippets

import initStoryshots from '@storybook/addon-storyshots'
import { devices } from 'puppeteer'

function createCustomizePage(pupDevice) {
  return page => page.emulate(pupDevice)
}

['iPad', 'iPhone X'].forEach(supportedDevice => {
  const pupDevice = devices[supportedDevice]

  const customizePage = createCustomizePage(pupDevice)

  initStoryshots({
    suite: `Image storyshots: ${pupDevice.name}`,
    test: imageSnapshot({
      customizePage,
    }),
  })
})

System: System: OS: macOS Mojave 10.14.6 CPU: (4) x64 Intel® Core™ i5-7267U CPU @ 3.10GHz Binaries: Node: 12.16.1 - ~/.nvm/versions/node/v12.16.1/bin/node Yarn: 1.22.4 - npm: 6.13.4 - ~/.nvm/versions/node/v12.16.1/bin/npm Browsers: Chrome: 81.0.4044.138 Firefox: 67.0 Safari: 13.1 npmPackages: @storybook/addon-actions: 5.3.18 => 5.3.18 @storybook/addon-backgrounds: 5.3.18 => 5.3.18 @storybook/addon-centered: 5.3.18 => 5.3.18 @storybook/addon-contexts: 5.3.18 => 5.3.18 @storybook/addon-docs: 5.3.18 => 5.3.18 @storybook/addon-knobs: 5.3.18 => 5.3.18 @storybook/addon-links: 5.3.18 => 5.3.18 @storybook/addon-notes: 5.3.18 => 5.3.18 @storybook/addon-storyshots: 5.3.18 => 5.3.18 @storybook/addon-storyshots-puppeteer: 5.3.18 => 5.3.18 @storybook/addon-viewport: 5.3.18 => 5.3.18 @storybook/addons: 5.3.18 => 5.3.18 @storybook/codemod: 5.3.18 => 5.3.18 @storybook/vue: 5.3.18 => 5.3.18

Additional context The screenshots look correct. There are no errors.