diff --git a/keepassxc-browser/common/sites.js b/keepassxc-browser/common/sites.js
index ee159d0..3267523 100644
--- a/keepassxc-browser/common/sites.js
+++ b/keepassxc-browser/common/sites.js
@@ -100,6 +100,9 @@ kpxcSites.exceptionFound = function(identifier, field) {
     } else if (document.location.origin === 'https://id.atlassian.com' &&
                 Array.isArray(identifier) && identifier?.contains('password-field')) {
         return true;
+    } else if (document.location.origin === 'https://app.fastmail.com'
+        && identifier?.contains('u-space-y-5') && field?.id === 'v25') {
+        return true;
     }
 
     return false;
diff --git a/keepassxc-browser/content/fields.js b/keepassxc-browser/content/fields.js
index 731d604..8920a1a 100644
--- a/keepassxc-browser/content/fields.js
+++ b/keepassxc-browser/content/fields.js
@@ -29,7 +29,7 @@ kpxcFields.getAllCombinations = async function(inputs) {
                 form: input.form
             };
 
-            combinations.push(combination);
+            combinations.push(kpxcFields.getExistingCombination(combination));
             usernameField = null;
         } else if (kpxcTOTPIcons.isValid(input)) {
             // Dynamically added TOTP field
@@ -93,6 +93,26 @@ kpxcFields.getCombinationFromAllInputs = function() {
     return kpxc.combinations[0];
 };
 
+// Checks if existing combination is found and recognized fields are added to it
+kpxcFields.getExistingCombination = function(combination) {
+    // Lookup existing combinations that use the same form
+    const existingCombination = kpxc.combinations?.find(c => c.form === combination?.form);
+    if (existingCombination) {
+        // Replace values to the existing combination
+        existingCombination.username ??= combination.username;
+        existingCombination.password ??= combination.password;
+        if (existingCombination.passwordInputs?.length === 0) {
+            existingCombination.passwordInputs = combination.passwordInputs;
+        } else {
+            existingCombination.passwordInputs.push(combination.password);
+        }
+
+        return existingCombination;
+    }
+
+    return combination;
+};
+
 // Adds segmented TOTP fields to the combination if found
 kpxcFields.getSegmentedTOTPFields = function(inputs, combinations) {
     if (!kpxc.settings.showOTPIcon) {