Use the dispose() method to reset the global values. Works excellently!! :D

lib/pages/report.dart

@@ -31,7 +31,17 @@ class ProjectionPage extends StatefulWidget {
 }
 
 class _ProjectionPageState extends State<ProjectionPage> {
-  bool? _showProjections = true;
+  bool _showProjections = true;
+
+  @override
+  void dispose() {
+    _assetTotal = -2;
+    _expenseMonthly = -2;
+    _expenseYearly = -2;
+    _incomeMonthly = -2;
+    _incomeYearly = -2;
+    super.dispose();
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -50,7 +60,6 @@ class _ProjectionPageState extends State<ProjectionPage> {
     );
 
     // Calculations for the projections.
-
     Widget projections;
     if (_assetTotal < 0 ||
         _incomeMonthly < 0 ||
@@ -59,7 +68,11 @@ class _ProjectionPageState extends State<ProjectionPage> {
         _expenseYearly < 0) {
       _showProjections = false;
 
-      projections = Center(child: SizedBox(child: CircularProgressIndicator()));
+      projections = Center(
+        child: SizedBox(
+          child: CircularProgressIndicator(),
+        ),
+      );
 
       Future.delayed(Duration(seconds: 1), () {
         setState(() {