"Ampdoc for shell has not been installed" in shadow document #16043
Description
AMP ad not collapsing (similar to #12645) on all browsers in a shadow document, e.g., the same webpage as in the referenced bug:
This does not happen in the base AMP page that the PWA loads:
Error message from console:
Unable to load ad implementation for type doubleclick , falling back to 3p, error: Error: Ampdoc for shell has not been installed
Stack trace:
wa@https://cdn.ampproject.org/shadow-v0.js:8:169
f.createError@https://cdn.ampproject.org/shadow-v0.js:4:33
f.getAmpDoc@https://cdn.ampproject.org/shadow-v0.js:187:109
K@https://cdn.ampproject.org/rtv/001528909142235/v0/amp-ad-network-doubleclick-impl-0.1.js:12:33
H@https://cdn.ampproject.org/rtv/001528909142235/v0/amp-ad-network-doubleclick-impl-0.1.js:11:909
O@https://cdn.ampproject.org/rtv/001528909142235/v0/amp-ad-network-doubleclick-impl-0.1.js:17:590
wb@https://cdn.ampproject.org/rtv/001528909142235/v0/amp-ad-network-doubleclick-impl-0.1.js:26:148
f/g.initLifecycleReporter@https://cdn.ampproject.org/rtv/001528909142235/v0/amp-ad-network-doubleclick-impl-0.1.js:192:253
pe@https://cdn.ampproject.org/rtv/001528909142235/v0/amp-ad-network-doubleclick-impl-0.1.js:168:48
f/Z.prototype.upgradeCallback/</</</<@https://cdn.ampproject.org/rtv/001528909142235/v0/amp-ad-0.1.js:107:425
log.js:164:6
What browsers are affected?
Reproducible on Chrome & Firefox
Which AMP version is affected?
Canary release 1528909142235 (tracking issue #16025)