diff --git a/core/navidrome_client.py b/core/navidrome_client.py
index a4adba5e..e2530683 100644
--- a/core/navidrome_client.py
+++ b/core/navidrome_client.py
@@ -301,8 +301,19 @@ class NavidromeClient:
             'f': 'json'  # Response format
         }
 
+    # Subsonic endpoints that modify data — use POST to avoid URL length limits
+    _WRITE_ENDPOINTS = frozenset({
+        'createPlaylist', 'updatePlaylist', 'deletePlaylist',
+        'star', 'unstar', 'scrobble', 'setRating',
+        'createShare', 'updateShare', 'deleteShare',
+        'createUser', 'updateUser', 'deleteUser',
+        'createBookmark', 'deleteBookmark',
+        'startScan',
+    })
+
     def _make_request(self, endpoint: str, params: Optional[Dict[str, Any]] = None) -> Optional[Dict[str, Any]]:
-        """Make authenticated request to Navidrome Subsonic API"""
+        """Make authenticated request to Navidrome Subsonic API.
+        Uses POST for write operations (avoids URL length limits with large playlists)."""
         if not self.base_url or not self.username:
             return None
 
@@ -314,7 +325,12 @@ class NavidromeClient:
             auth_params.update(params)
 
         try:
-            response = requests.get(url, params=auth_params, timeout=10)
+            # Use POST for write operations to avoid URL length limits
+            # (e.g., createPlaylist with 161 songId params would exceed GET URL limits)
+            if endpoint in self._WRITE_ENDPOINTS:
+                response = requests.post(url, data=auth_params, timeout=30)
+            else:
+                response = requests.get(url, params=auth_params, timeout=10)
             response.raise_for_status()
 
             data = response.json()
diff --git a/webui/static/script.js b/webui/static/script.js
index 3d677323..f7978bf4 100644
--- a/webui/static/script.js
+++ b/webui/static/script.js
@@ -57586,7 +57586,8 @@ function renderMirroredCard(p, container) {
     let ratioHtml = '';
     if (disc > 0) {
         const complete = disc >= tot;
-        ratioHtml = `<span class="discovery-ratio${complete ? ' complete' : ''}">${disc}/${tot} discovered</span>`;
+        const srcName = typeof currentMusicSourceName !== 'undefined' ? currentMusicSourceName : 'metadata';
+        ratioHtml = `<span class="discovery-ratio${complete ? ' complete' : ''}">${disc}/${tot} discovered on ${srcName}</span>`;
     }
 
     const card = document.createElement('div');