Custom fields Filters issue

-- HikaShop version -- : 6.4.1
-- Joomla version -- : 5.4.5
-- PHP version -- : 8.4

Good morning,

When setting filters with custom fields, in the "custom field" field, I should be able to choose between 3 different custom fields but curently only one of my 3 custom fields is displayed.
Any idea what's the issue?

Thanks in advance for your help.

Sandra