fix synchronisation between users

static/wall.js

@@ -82,7 +82,7 @@ export class Layer {
                             downloaded.height,
                         ),
                     );
-                    chunkAllocator.freeDownloaded(downloaded.data);
+                    chunkAllocator.freeDownload(downloaded.data);
                     let canvas = new OffscreenCanvas(downloaded.width, downloaded.height);
                     let ctx = canvas.getContext("bitmaprenderer");
                     ctx.transferFromImageBitmap(imageBitmap);