diff --git a/cashtab/package-lock.json b/cashtab/package-lock.json
--- a/cashtab/package-lock.json
+++ b/cashtab/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "cashtab",
-    "version": "2.15.0",
+    "version": "2.15.1",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "cashtab",
-            "version": "2.15.0",
+            "version": "2.15.1",
             "dependencies": {
                 "@ant-design/icons": "^5.3.0",
                 "@bitgo/utxo-lib": "^9.33.0",
diff --git a/cashtab/package.json b/cashtab/package.json
--- a/cashtab/package.json
+++ b/cashtab/package.json
@@ -1,6 +1,6 @@
 {
     "name": "cashtab",
-    "version": "2.15.0",
+    "version": "2.15.1",
     "private": true,
     "scripts": {
         "start": "node scripts/start.js",
diff --git a/cashtab/src/validation/fixtures/vectors.js b/cashtab/src/validation/fixtures/vectors.js
--- a/cashtab/src/validation/fixtures/vectors.js
+++ b/cashtab/src/validation/fixtures/vectors.js
@@ -81,7 +81,8 @@
                 sendDisabled: true,
             },
             {
-                description: 'Enabled for valid address and amount',
+                description:
+                    'Enabled for valid address and amount in send to one mode',
                 formData: {
                     address: 'ecash:qp89xgjhcqdnzzemts0aj378nfe2mhu9yvxj9nhgg6',
                     amount: '50',
@@ -97,6 +98,24 @@
                 isOneToManyXECSend: false,
                 sendDisabled: false,
             },
+            {
+                description:
+                    'Disabled for valid address and amount entered in send to one mode, but app is in send to many mode and input is blank',
+                formData: {
+                    address: 'ecash:qp89xgjhcqdnzzemts0aj378nfe2mhu9yvxj9nhgg6',
+                    amount: '50',
+                    multiAddressInput: '',
+                },
+                balanceSats: 10000,
+                apiError: false,
+                sendAmountError: false,
+                sendAddressError: false,
+                multiSendAddressError: false,
+                isMsgError: false,
+                priceApiError: false,
+                isOneToManyXECSend: true,
+                sendDisabled: true,
+            },
             {
                 description: 'Disabled on zero balance for send to one',
                 formData: {
diff --git a/cashtab/src/validation/index.js b/cashtab/src/validation/index.js
--- a/cashtab/src/validation/index.js
+++ b/cashtab/src/validation/index.js
@@ -577,7 +577,9 @@
         // Disabled if we do not have a fiat price AND the user is attempting to send fiat
         priceApiError ||
         // Disabled if send to many and we have a send to many validation error
-        (isOneToManyXECSend && multiSendAddressError !== false)
+        (isOneToManyXECSend && multiSendAddressError !== false) ||
+        // Disabled if send to many and send to many input is blank
+        (isOneToManyXECSend && formData.multiAddressInput === '')
     );
 };