Flutter button gets enlarged onPressed()

Question

I have built a paywall component in flutterflow - But the payment button enlarges itself while loading the revenuecat subscription plans. Here is the iOS screenshot of the iOS button before pressed and iOS button after pressed

Below is the code that I have for my widget. How can i overcome the issue?

import '../flutter_flow/flutter_flow_theme.dart';
import '../flutter_flow/flutter_flow_util.dart';
import '../flutter_flow/flutter_flow_widgets.dart';
import '../flutter_flow/custom_functions.dart' as functions;
import '../flutter_flow/revenue_cat_util.dart' as revenue_cat;
import 'package:auto_size_text/auto_size_text.dart';
import 'package:flutter/material.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:provider/provider.dart';

import 'paywall_model.dart';
export 'paywall_model.dart';

class PaywallWidget extends StatefulWidget {
  const PaywallWidget({Key? key}) : super(key: key);

  @override
  _PaywallWidgetState createState() => _PaywallWidgetState();
}

class _PaywallWidgetState extends State<PaywallWidget> {
  late PaywallModel _model;

  @override
  void setState(VoidCallback callback) {
    super.setState(callback);
    _model.onUpdate();
  }

  @override
  void initState() {
    super.initState();
    _model = createModel(context, () => PaywallModel());
  }

  @override
  void dispose() {
    _model.maybeDispose();

    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    context.watch<FFAppState>();

    return ClipRRect(
      borderRadius: BorderRadius.circular(0.0),
      child: Container(
        width: double.infinity,
        height: MediaQuery.of(context).size.height * 1.0,
        decoration: BoxDecoration(
          color: FlutterFlowTheme.of(context).primaryBackground,
          boxShadow: [
            BoxShadow(
              blurRadius: 4.0,
              color: Color(0x33000000),
              offset: Offset(0.0, 2.0),
            )
          ],
          borderRadius: BorderRadius.circular(0.0),
          shape: BoxShape.rectangle,
          border: Border.all(
            color: FlutterFlowTheme.of(context).primaryBackground,
          ),
        ),
        child: Padding(
          padding: EdgeInsetsDirectional.fromSTEB(12.0, 12.0, 12.0, 12.0),
          child: Column(
            mainAxisSize: MainAxisSize.max,
            mainAxisAlignment: MainAxisAlignment.start,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Container(
                width: 500.0,
                height: 187.1,
                child: Stack(
                  children: [
                    Align(
                      alignment: AlignmentDirectional(-0.96, -0.18),
                      child: Padding(
                        padding: EdgeInsetsDirectional.fromSTEB(
                            10.0, 30.0, 10.0, 30.0),
                        child: SelectionArea(
                            child: Text(
                          revenue_cat.offerings!.current!.lifetime!.product
                              .description,
                          textAlign: TextAlign.start,
                          style: FlutterFlowTheme.of(context).bodyText2,
                        )),
                      ),
                    ),
                    Align(
                      alignment: AlignmentDirectional(-0.96, -0.85),
                      child: Padding(
                        padding: EdgeInsetsDirectional.fromSTEB(
                            10.0, 10.0, 10.0, 10.0),
                        child: SelectionArea(
                            child: AutoSizeText(
                          revenue_cat
                              .offerings!.current!.lifetime!.product.title
                              .maybeHandleOverflow(
                            maxChars: 100,
                            replacement: '…',
                          ),
                          textAlign: TextAlign.start,
                          style: FlutterFlowTheme.of(context)
                              .subtitle1
                              .override(
                                fontFamily: 'AvernirNextLTPro',
                                color: FlutterFlowTheme.of(context).primaryText,
                                useGoogleFonts: false,
                              ),
                        )),
                      ),
                    ),
                    Align(
                      alignment: AlignmentDirectional(0.0, 0.0),
                      child: Padding(
                        padding: EdgeInsetsDirectional.fromSTEB(
                            10.0, 80.0, 10.0, 0.0),
                        child: FFButtonWidget(
                          onPressed: () {
                            print('Button pressed ...');
                          },
                          text: functions.concatPriceString(revenue_cat
                              .offerings!
                              .current!
                              .lifetime!
                              .product
                              .priceString)!,
                          options: FFButtonOptions(
                            width: 300.0,
                            padding: EdgeInsetsDirectional.fromSTEB(
                                0.0, 20.0, 0.0, 20.0),
                            color: Color(0xFF485946),
                            textStyle:
                                FlutterFlowTheme.of(context).subtitle2.override(
                                      fontFamily: 'AvernirNextLTPro',
                                      color: Colors.white,
                                      useGoogleFonts: false,
                                    ),
                            elevation: 2.0,
                            borderSide: BorderSide(
                              color: Colors.transparent,
                              width: 1.0,
                            ),
                            borderRadius: BorderRadius.circular(25.0),
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}