Problem : integer number (without decimal) instead of decimal number

Hi!

Woocommerce setting :
currency : canadian dollars
currency position : right with space
thousands separator : (nothing)
decimal separator : ,
number of decimal : 2

When I’m in a product in the admin, I check the box ? Enable Extra Cost ? then enter Extra Cost Label, Extra Cost amount and Extra Cost +1 quantity. I try to enter 6.50 in the Extra Cost Amount but it display an error (digits only, comma, no space, no point, etc.) so I enter 6,50 but in the website, it display 6 $ instead of 6,50 $. What is strange is that it’s working for the field Extra Cost +1 quantity : I can enter 6,50 (that will display only 6 $ in the cart) or I can enter 6.50 that will display 6,50 $ as wished in the cart.

Is it possible to make it work properly in the 2 field and depending of the decimal separator defined?

Thanks and have a nice day!!