Expose filters in block > empty fields

Hello,

I created a view with some selective exposed filters. I embed the view in a panel, everything works perfectly.

Now I'm trying to separate the view from it's exposed filters, so I check the option "exposed filters as a block" and I embed that block in my panel.

When I go to my view page, I can see the view, I can see the blocks, but all my exposed filters are empty (I see the dropdown, but nothing in it), all my selective filters behave like that (the others filters appears correctly).

The only things I made between the perfectly working view and the broken one is to expose filters in a block, so I wonder there is a problem with that.

Alex