Maybe someone can help me here and clarify the following situation:

On Book of Ra Deluxe I got a free spins rollover on 1 line during the free spins. There were 3 books on the same line with 2 identical symbols:



I was assuming that the book would act as a scatter symbol in this slot, so there should be a full line with that blue bug? Because the line only paid out 0.02 CHF, ie profit for 3 books in any position.

Can someone enlighten me where the error in reasoning is with this slot or whether there is a mistake here?