I’ve figgered it out after looking at the code thanks!
Problem was, I had a plugin called hide admin bar.
And in the ‘reply.min.js’ file, the code needs the ID of ‘wpadminbar’ to jump to the top.
This was missing therefore giving a ScrollHeight error in the console.
To fix this is added an if else statement, if id ‘wpadminbar’ is not available, user id of ‘header’.
