Filter values emptied upon backend save

-- HikaShop version -- : 6.1.0
-- Joomla version -- : 5.4.0
-- PHP version -- : 8.2.14
-- Browser(s) name and version -- : Firefox 143.0.4
-- Error-message(debug-mod must be tuned on) -- : no error message

When we save a filter's settings on the backend the "Values" we've added are emptied. Attaching screenshots of before saving and then after saving.