diff --git a/api/src/org/labkey/api/data/MultiValuedDisplayColumn.java b/api/src/org/labkey/api/data/MultiValuedDisplayColumn.java
index 4b5a3812e06..63923431091 100644
--- a/api/src/org/labkey/api/data/MultiValuedDisplayColumn.java
+++ b/api/src/org/labkey/api/data/MultiValuedDisplayColumn.java
@@ -18,6 +18,7 @@
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.labkey.api.query.FieldKey;
+import org.labkey.api.util.DOM;
 import org.labkey.api.writer.HtmlWriter;
 
 import java.util.ArrayList;
@@ -28,6 +29,8 @@
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
+import static org.labkey.api.util.DOM.TD;
+
 /**
  * Wraps any DisplayColumn and causes it to render each value separately. Often used in conjunction with
  * MultiValuedLookupColumn
@@ -209,4 +212,18 @@ public Object getInputValue(RenderContext ctx)
     {
         return values(ctx, _column::getInputValue);
     }
+
+    // Issue 52983: This override matches the DisplayColumn.renderInputCell() implementation.
+    // It's necessary to cancel out DisplayColumnDecorator's override.
+    @Override
+    public void renderInputCell(RenderContext ctx, HtmlWriter out)
+    {
+        TD(
+            getInputAttributes(),
+            (DOM.Renderable) ret -> {
+                renderInputHtml(ctx, out, getInputValue(ctx));
+                return ret;
+            }
+        ).appendTo(out);
+    }
 }
diff --git a/experiment/src/org/labkey/experiment/api/AliasDisplayColumnFactory.java b/experiment/src/org/labkey/experiment/api/AliasDisplayColumnFactory.java
index 80667a76bcd..6f78bf7f455 100644
--- a/experiment/src/org/labkey/experiment/api/AliasDisplayColumnFactory.java
+++ b/experiment/src/org/labkey/experiment/api/AliasDisplayColumnFactory.java
@@ -38,7 +38,7 @@ public Object getInputValue(RenderContext ctx)
 
                             sb.append(delim);
                             sb.append(name);
-                            delim = ",";
+                            delim = ", ";
                         }
                     }
                 }