diff --git a/Packages/ComposeUI/Sources/ComposeUI/Controllers/AttachmentThumbnailController.swift b/Packages/ComposeUI/Sources/ComposeUI/Controllers/AttachmentThumbnailController.swift
index c405fb2f..4c465b3a 100644
--- a/Packages/ComposeUI/Sources/ComposeUI/Controllers/AttachmentThumbnailController.swift
+++ b/Packages/ComposeUI/Sources/ComposeUI/Controllers/AttachmentThumbnailController.swift
@@ -95,19 +95,21 @@ class AttachmentThumbnailController: ViewController {
                     self.gifController = GIFController(gifData: data)
                 } else if type.conforms(to: .image),
                    let image = UIImage(data: data) {
-                    if fullSize {
+                    // using prepareThumbnail on images from PHPicker results in extremely high memory usage,
+                    // crashing share extension. see FB12186346
+//                    if fullSize {
                         image.prepareForDisplay { prepared in
                             DispatchQueue.main.async {
-                                self.image = prepared
+                                self.image = image
                             }
                         }
-                    } else {
-                        image.prepareThumbnail(of: CGSize(width: 80, height: 80)) { prepared in
-                            DispatchQueue.main.async {
-                                self.image = prepared
-                            }
-                        }
-                    }
+//                    } else {
+//                        image.prepareThumbnail(of: CGSize(width: 80, height: 80)) { prepared in
+//                            DispatchQueue.main.async {
+//                                self.image = prepared
+//                            }
+//                        }
+//                    }
                 }
             }
         }