diff --git a/core/block_flyout_inflater.ts b/core/block_flyout_inflater.ts
index 6011b150e..b180dbc0c 100644
--- a/core/block_flyout_inflater.ts
+++ b/core/block_flyout_inflater.ts
@@ -101,6 +101,15 @@ export class BlockFlyoutInflater implements IFlyoutInflater {
       ) {
         blockDefinition['disabledReasons'] = [MANUALLY_DISABLED];
       }
+      // These fields used to be allowed and may still be present, but are
+      // ignored here since everything in the flyout should always be laid out
+      // linearly.
+      if ('x' in blockDefinition) {
+        delete blockDefinition['x'];
+      }
+      if ('y' in blockDefinition) {
+        delete blockDefinition['y'];
+      }
       block = blocks.appendInternal(blockDefinition as blocks.State, workspace);
     }
 
diff --git a/core/utils/toolbox.ts b/core/utils/toolbox.ts
index 296bb6dcc..f81ebdc72 100644
--- a/core/utils/toolbox.ts
+++ b/core/utils/toolbox.ts
@@ -24,8 +24,6 @@ export interface BlockInfo {
   disabledReasons?: string[];
   enabled?: boolean;
   id?: string;
-  x?: number;
-  y?: number;
   collapsed?: boolean;
   inline?: boolean;
   data?: string;