diff --git a/package-lock.json b/package-lock.json
index ccc091b3ec..3715a7301f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15563,6 +15563,7 @@
       "resolved": "https://registry.npmjs.org/karma-firefox-launcher/-/karma-firefox-launcher-2.1.3.tgz",
       "integrity": "sha512-LMM2bseebLbYjODBOVt7TCPP9OI2vZIXCavIXhkO9m+10Uj5l7u/SKoeRmYx8FYHTVGZSpk6peX+3BMHC1WwNw==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "is-wsl": "^2.2.0",
         "which": "^3.0.0"
diff --git a/src/AbsoluteCellRange.ts b/src/AbsoluteCellRange.ts
index 0b9585fb6d..6cba3c563f 100644
--- a/src/AbsoluteCellRange.ts
+++ b/src/AbsoluteCellRange.ts
@@ -26,8 +26,14 @@ export interface SimpleCellRange {
   end: SimpleCellAddress,
 }
 
-export function isSimpleCellRange(obj: any): obj is SimpleCellRange {
-  if (obj && (typeof obj === 'object' || typeof obj === 'function')) {
+/**
+ * Type guard that checks if an object is a valid SimpleCellRange.
+ * @param {unknown} val - Value to check
+ * @returns {boolean} True if and only if the object is a valid SimpleCellRange
+ */
+export function isSimpleCellRange(val: unknown): val is SimpleCellRange {
+  if (val && (typeof val === 'object' || typeof val === 'function')) {
+    const obj = val as Record<string, unknown>
     return 'start' in obj && isSimpleCellAddress(obj.start) && 'end' in obj && isSimpleCellAddress(obj.end)
   } else {
     return false
diff --git a/test/unit/cruds/change-cell-content.spec.ts b/test/unit/cruds/change-cell-content.spec.ts
index c8c5a9b7c3..d34f09f32a 100644
--- a/test/unit/cruds/change-cell-content.spec.ts
+++ b/test/unit/cruds/change-cell-content.spec.ts
@@ -582,6 +582,20 @@ describe('changing cell content', () => {
     expect(engine.getCellValueDetailedType({ sheet: 0, col: 0, row: 1 })).toEqual(CellValueDetailedType.NUMBER_CURRENCY)
     expect(engine.getCellValueDetailedType({ sheet: 0, col: 0, row: 2 })).toEqual(CellValueDetailedType.NUMBER_PERCENT)
   })
+
+  it('should work in scenario from issue https://github.com/handsontable/hyperformula/issues/1297', () => {
+    const engine = HyperFormula.buildFromArray([
+      [1, 2, '=SUM(A1:B1)'],
+      ['=SUM(1:1)', 0, 0],
+      ['=SUM(1:2)', 0, 0],
+    ])
+
+    engine.setCellContents(adr('C1'), [['=SUM(A1:B1)']])
+    engine.setCellContents(adr('A3'), [['=SUM(A1:C2)']])
+    engine.setCellContents(adr('B1'), [[null]])
+
+    expect(engine.getCellValue(adr('A3'))).toEqual(4)
+  })
 })
 
 describe('change multiple cells contents', () => {