This issue comes from your website, it has some JS function working on forms and form fields. I see non-wpForo animations and actions. I'd recommend deactivate all plugins, delete cache and test it again, then activate one by one and find the conflict maker plugin. This also may be WordPress team addon.

Thats not worked :c

What exactly? Could you please explain what have you done step by step?

Also please send some user login details to support[at]gvectors.com to allow us test it as well.