I'm using 1password extensions (name "1Password X – Password Manager") v1.15.2 in Firefox 69. which is running on Windows 7 64bit system.
When click the "copy" button on password field, the popup windows is closed but not any data copy to system clipboard.
The previous version of 1password extension is worked.
1Password Version: Not Provided
Extension Version: 1.15.2
OS Version: Windows 7 64Bit
Sync Type: Not Provided