As you can see Edge's autofill popup covers the Extension's autofill prompt. I don't face this issue in Google Chrome though. And it happens on all login pages.
I have checked all autofill settings and flags I could find in the Edge and disabled/turned them off and yet browser's prompt still shows and covers 1password's prompt. I guess one way would be to delete all saved passwords from Edge which is my last option and something I want to avoid.
Please look into it.
1Password Version: 7.6.778
Extension Version: 1.20.0
OS Version: Windows 10 2004 (Build 19041.388)
Sync Type: Not Provided