Simple search won't search for numbers

I was following 2 different youtube videos how to create simple search. Finally I was able to create it 2 weeks ago but it was working only for a couple of hours. I didn't change anything, after a while it stopped searching for numbers. I recreated my search page per the videos I was learning before but it still doesn't work. It would be nice to see what the issue is. How to solve it?
One of the video I was following is Andrew, Head of Design at FlutterFlow.

(as you can see the result comes up on the autocomplete but it is not coming up on the listview down below. In case a lettertype, it comes up on the autocomplete and the listview as well)

Thanks