Since update to Firefox 86.0 Kee only (auto)fills user name, not password

after I updated Firefox to v86.0 all logins are only filled with the user name, not with the password, even if I click on the Kee icon in the login form.

In the moment the browser loads the web page this error is in the log:

20:55:15.402 sendRemoveListener on closed conduit keefox@chris.tomlinson.137438953619 ConduitsChild.jsm:108
_send resource://gre/modules/ConduitsChild.jsm:108
_send self-hosted:1281
removeListener resource://gre/modules/ExtensionChild.jsm:663
removeListener resource://gre/modules/ExtensionChild.jsm:886
onChanged chrome://extensions/content/child/ext-storage.js:337
removeListener resource://gre/modules/ExtensionCommon.jsm:2522
revoke resource://gre/modules/ExtensionCommon.jsm:2544
close resource://gre/modules/ExtensionCommon.jsm:2549
unload resource://gre/modules/ExtensionCommon.jsm:912
close resource://gre/modules/ExtensionContent.jsm:930
destroyed resource://gre/modules/ExtensionContent.jsm:1008
observe resource://gre/modules/ExtensionContent.jsm:1026

Edit: I deactivated Kee and used the autotype function of KeePass (Ctrl+Alt+A), that works correct. So I think it must be a Kee issue.

Not confirmed here. still works fine after the Firefox upgrade
Actual x64 Firefox 86.0
Kee Plugin 3.7.8
Windows 10 20H2

It turned out to be a incompatibility with the add-on “Show me the password!” which was no problem so far. Don’t know whether that is caused by Firefox, Kee or the add-on. I changed to a different add-on that does not show an icon in the password field as Kee does, but below.