suggestionCallback always called on focus?

[ethel39]

Hello i tried this package but everytime focus to TypeAheadFormField it always call suggestionsCallback even if it is empty or have value that i didn't change yet, is this expected behavior ?

i tried to run example and it is still happening

i already tried to set getImmediateSuggestions to false and it is still run callback

i used Flutter (Channel stable, 3.3.1, on Microsoft Windows [Version 10.0.19044.1889], locale en-VU)

Thank you