This bug is partially fixed by bug 1906292. All the fields are now autofilled and cleared accordingly, BUT when the autofill is triggered from the card Number or card Name fields, the expiry date field doesn't display the clear form dropdown. If the autofill is triggered from the expiry date field, it will display the clear form dropdown, but the card Name field will display the wrong dropdown (the autocomplete dropdown is displayed instead of clear form dropdown). All the fields are in the same iframe with the same origin. See the screen recording attached here.
Bug 1822858 Comment 4 Edit History
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This bug is partially fixed by bug 1906292. All the fields are now autofilled and cleared accordingly, BUT when the autofill is triggered from the card Number or card Name fields, the expiry date field doesn't display the clear form dropdown. If the autofill is triggered from the expiry date field, it will display the clear form dropdown, but the card Name field will display the wrong dropdown (the autocomplete dropdown is displayed instead of clear form dropdown). All the fields are in iframes with the same origin. See the screen recording attached here.