diff --git a/MLEM.Ui/Elements/TextField.cs b/MLEM.Ui/Elements/TextField.cs
index 5c2775f..2f24612 100644
--- a/MLEM.Ui/Elements/TextField.cs
+++ b/MLEM.Ui/Elements/TextField.cs
@@ -270,7 +270,7 @@ namespace MLEM.Ui.Elements {
             if (removeMismatching) {
                 var result = new StringBuilder();
                 foreach (var c in text.ToString()) {
-                    if (this.InputRule(this, c.ToString()))
+                    if (this.InputRule(this, c.ToCachedString()))
                         result.Append(c);
                 }
                 text = result.ToString();
diff --git a/MLEM/Formatting/Codes/ImageCode.cs b/MLEM/Formatting/Codes/ImageCode.cs
index 5951c17..dbbfbbc 100644
--- a/MLEM/Formatting/Codes/ImageCode.cs
+++ b/MLEM/Formatting/Codes/ImageCode.cs
@@ -25,7 +25,7 @@ namespace MLEM.Formatting.Codes {
 
         /// <inheritdoc />
         public override string GetReplacementString(GenericFont font) {
-            return GenericFont.OneEmSpace.ToString();
+            return GenericFont.OneEmSpace.ToCachedString();
         }
 
         /// <inheritdoc />