Can't edit text widgets with wordpress 4.8

As far as I know, WordPress 4.8 introduced new widget editor. Unfortunately, after the upgrade, I stumbled upon the bug when there’s no possibility to edit text widgets cuz the textarea is missing completely.
However, If I switch on some other template it works fine.
Has someone run across the same issue?

Hello there,

I hope you are doing well today.

So when you click on the text area the wysiwyg editor,does not appear?

Best Regards,

Yes, no textarea is visible.
The problem is connected to Shapely.

Hello there,

Thanks for that information.

I am still trying to replicate this issue but the text widget works on my test site.

Please try disabling any third party plugins that you have active to see if a conflict is at work here.

Best Regards,

Thanks for your help, guys.
Tested out the new version of Shapely. The issue indeed is not present.
Then I checked Functions.php of my template and found out that the problem is caused by the code which’s supposed to disable website URL field for comments:

/*removing website url field in the comments area*/
add_filter( 'script_loader_tag', 'js_defer_attr', 10 );
function crunchify_disable_comment_url($fields) { 
    return $fields;

Strange cuz before the update to wordpress 4.8 it did work OK.

By the way, a lot of good changes in Shapely since the version 1.0.5, considering to switch on it now.