Go to Reused Passwords Report.
Click on an entry.
In the entry’s popup, click on the eyeball.
Master password is displayed instead of entry’s password.
I realize that the last post on this topic was 2y ago+, but I am a new user and just encountered it following an import from LastPass. I believe it occurred when I had no data in both the user and password fields on a LastPass export - I had used several LastPass Login records for additional notes. When these rows were imported my first name was defaulted in as the user and my master password as the password. I was using premium vault.bitwarden.com in Chrome on Win-11 Pro