Only update fc placeholders while receiving non-empty data

Umbra.Game/src/Script/Placeholders/Library/FreeCompanyNamePlaceholder.cs

@@ -1,4 +1,5 @@
-using FFXIVClientStructs.FFXIV.Client.UI.Info;
+using Dalamud.Utility;
+using FFXIVClientStructs.FFXIV.Client.UI.Info;
 
 namespace Umbra.Game.Script;
 
@@ -12,6 +13,15 @@ internal class FreeCompanyNamePlaceholder() : ScriptPlaceholder(
     public unsafe void Update()
     {
         var fc = InfoProxyFreeCompany.Instance();
-        Value = fc != null ? fc->NameString : "";
+
+        // While world visiting or during duty, fc info is not available.
+        // Currently, the NameString property also does not update when returning from a duty.
+        // This also keeps the placeholder from being updated when the player leaves their fc.
+        if (fc == null || fc->Id == 0 || fc->NameString.IsNullOrEmpty())
+        {
+            return;
+        }
+
+        Value = fc->NameString;
     }
 }

Umbra.Game/src/Script/Placeholders/Library/FreeCompanyTagPlaceholder.cs

@@ -11,6 +11,13 @@ internal class FreeCompanyTagPlaceholder(IObjectTable objectTable) : ScriptPlace
     [OnTick]
     public void Update()
     {
-        Value = objectTable.LocalPlayer is ICharacter c ? c.CompanyTag.TextValue : "";
+        // The fc tag is not available in some cases e.g. world visiting or between areas.
+        // This also keeps the placeholder from being updated when the player leaves their fc.
+        if (objectTable.LocalPlayer is not ICharacter c || string.IsNullOrEmpty(c.CompanyTag.TextValue))
+        {
+            return;
+        }
+
+        Value = c.CompanyTag.TextValue;
     }
 }