Hi there,
there is no JS scripts related to GB, the issue looks to be related to this issue:
https://github.com/wp-media/wp-rocket/issues/3142
Which it doesn’t look like WP Rocket has fixed yet.
Do you have the Delay JS option enabled in WP Rocket ? If so try disabling that to confirm if its the same bug
The other thing to check in case as script is getting in the way is to disable the GP Back to Top button in Customizer > Layout > Footer. In case thats getting in the way.