Auto Complete widget not showing on release apk even with SHA1 registered

Hi Guys,

So i started using the auto complete widget and it's working well on debug,
i can search and select the location and it returns me the expected result,
but when i build the apk --release
and tried it on my phone,
the page just show me a blank screen,
both the search and maps are not showing
but when i run the debug version of apk on the same device
it works,
and if i comment the code for the autocomplete widget,
then the maps will also show just fine,
anyone have any idea what might be wrong?

i haven't uploaded the app to google console yet

(refer to screenshot below)

Expected Result on release:

What actually happened:

code from the app:
`Container(
color: Colors.transparent,
child: TextButton.icon(
onPressed: () async {
Prediction? p = await PlacesAutocomplete.show(
context: context,
apiKey: google_geocode_api,
mode: Mode.overlay,
offset: 0,
radius: 10000000,
strictbounds: false,
region: "sgp",
language: "en",
types: [],
components: [
new Component(Component.country, "sgp")
],
onError: (val) => print(val));
if(p != null) displayPrediction(p);
},
icon: Icon(Icons.search),
label: Text('Search', style: TextStyle(fontSize: 18))),
),`

setting on google api console:

sha1 from signinReport for release:

any help is appreciated, thanks guys