IFS not refuses to return an array

Data

<CellA1="One">

My Problem:

I'm using a simple IF function IF(A1="One", named_range_one) and it works like charm and returned the named_range_one. But as soon as I use IFS it stops returning my named range. It seems like a bug or phrasing error for me. I also tried to wrap it into an ARRAYFORMULA but that didn't work out as well. So IFS(A1="One", named_range_one, A1="Two", named_range_two) as soon as I use IFS my function stops working and returns the error "An array value could not be found". I can't find a solution to this problem.