diff --git a/src/components/Composer/index.js b/src/components/Composer/index.js
index cbd22cc39dfd..d29e89452e30 100755
--- a/src/components/Composer/index.js
+++ b/src/components/Composer/index.js
@@ -83,6 +83,9 @@ const propTypes = {
     /** Whether this is the report action compose */
     isReportActionCompose: PropTypes.bool,
 
+    /** Whether the sull composer is open */
+    isComposerFullSize: PropTypes.bool,
+
     ...withLocalizePropTypes,
 
     ...windowDimensionsPropTypes,
@@ -111,6 +114,7 @@ const defaultProps = {
     shouldCalculateCaretPosition: false,
     checkComposerVisibility: () => false,
     isReportActionCompose: false,
+    isComposerFullSize: false,
 };
 
 /**
@@ -161,6 +165,7 @@ function Composer({
     checkComposerVisibility,
     selection: selectionProp,
     isReportActionCompose,
+    isComposerFullSize,
     ...props
 }) {
     const textRef = useRef(null);
@@ -440,9 +445,9 @@ function Composer({
             numberOfLines < maxLines ? styles.overflowHidden : {},
 
             StyleSheet.flatten([style, {outline: 'none'}]),
-            StyleUtils.getComposeTextAreaPadding(numberOfLinesProp),
+            StyleUtils.getComposeTextAreaPadding(numberOfLinesProp, isComposerFullSize),
         ],
-        [style, maxLines, numberOfLinesProp, numberOfLines],
+        [style, maxLines, numberOfLinesProp, numberOfLines, isComposerFullSize],
     );
 
     return (
diff --git a/src/styles/StyleUtils.ts b/src/styles/StyleUtils.ts
index 1def6de70819..6e26056e2050 100644
--- a/src/styles/StyleUtils.ts
+++ b/src/styles/StyleUtils.ts
@@ -1098,11 +1098,18 @@ function getMentionTextColor(isOurMention: boolean): string {
 /**
  * Returns padding vertical based on number of lines
  */
-function getComposeTextAreaPadding(numberOfLines: number): ViewStyle | CSSProperties {
+function getComposeTextAreaPadding(numberOfLines: number, isComposerFullSize: boolean): ViewStyle | CSSProperties {
     let paddingValue = 5;
-    if (numberOfLines === 1) paddingValue = 9;
-    // In case numberOfLines = 3, there will be a Expand Icon appearing at the top left, so it has to be recalculated so that the textArea can be full height
-    if (numberOfLines === 3) paddingValue = 8;
+    // Issue #26222: If isComposerFullSize paddingValue will always be 5 to prevent padding jumps when adding multiple lines.
+    if (!isComposerFullSize) {
+        if (numberOfLines === 1) {
+            paddingValue = 9;
+        }
+        // In case numberOfLines = 3, there will be a Expand Icon appearing at the top left, so it has to be recalculated so that the textArea can be full height
+        else if (numberOfLines === 3) {
+            paddingValue = 8;
+        }
+    }
     return {
         paddingTop: paddingValue,
         paddingBottom: paddingValue,