After upgrading to 7.6.4, I've got the error "Nonce is invalid" when commenting both as a logged in or anonymous user.
I've already cleared all caches. I'll downgrade to 7.6.3 for now.
I have the same problem - does not happen all the time. Where do I get version 7.6.3 - that worked well.
I'm seeing the same thing. Cleared and disabled caches, used WP AJAX functions, page reload, etc. Rolled back to 7.6.3 and it's fine.
Same here, roll back solves it
it's not the first time that this issue with nonces appears within the plugin, seems to be a recurring challenge for the developers. I'll stay away from any further update that mentions something related to nonces until it's proven to work flawlessly.
I've already asked the developers to check the issue. Please wait a bit. I'll update the topic once I get some news for you.
Having same issue. "Nonce is invalid."