RootCauseunvalidated
The COOP policy triggers the navigation algorithm for a cross-origin opener context to force noopener behavior (it sets windowType to 'new with no opener'), and per spec window.open returns null when noopener/windowType is 'new with no opener'.
ce6377cb-5a6a-42fe-a738-e9476611e185
The COOP policy triggers the navigation algorithm for a cross-origin opener context to force noopener behavior (it sets windowType to 'new with no opener'), and per spec window.open returns null when noopener/windowType is 'new with no opener'.