Product Characteristic Add Remove not active

-- HikaShop version -- : 6.5.0
-- Joomla version -- : 6.1.1
-- PHP version -- : 8.3.31

Since upgrading to Joomla 6.1.1 and Hikashop 6.5.0 we can no longer add or remove Characteristics on products.

When you mouse over the + or Delete icons, the cursor does not change to a Hand icon.

A quick search says this could be a Javascript issue.

Could you please advise on how to fix or further troubleshoot this issue.