Merge branch 'master' into zach-starter

1 files changed, 3 insertions, 2 deletions

diff --git a/src/client/views/collections/CollectionStackingView.tsx b/src/client/views/collections/CollectionStackingView.tsx
index ea1caf58f..3a62a53d7 100644
--- a/src/client/views/collections/CollectionStackingView.tsx
+++ b/src/client/views/collections/CollectionStackingView.tsx
@@ -11,7 +11,7 @@ import { listSpec } from '../../../fields/Schema';
 import { SchemaHeaderField } from '../../../fields/SchemaHeaderField';
 import { BoolCast, Cast, DocCast, NumCast, ScriptCast, StrCast } from '../../../fields/Types';
 import { TraceMobx } from '../../../fields/util';
-import { DivHeight, emptyFunction, returnEmptyDoclist, returnFalse, returnNone, returnZero, setupMoveUpEvents, smoothScroll, Utils } from '../../../Utils';
+import { DivHeight, emptyFunction, returnEmptyDoclist, returnNone, returnZero, setupMoveUpEvents, smoothScroll, Utils } from '../../../Utils';
 import { Docs, DocUtils } from '../../documents/Documents';
 import { CollectionViewType } from '../../documents/DocumentTypes';
 import { DragManager, dropActionType } from '../../util/DragManager';
@@ -24,7 +24,7 @@ import { EditableView } from '../EditableView';
 import { LightboxView } from '../LightboxView';
 import { CollectionFreeFormDocumentView } from '../nodes/CollectionFreeFormDocumentView';
 import { DocumentView } from '../nodes/DocumentView';
-import { FocusViewOptions, FieldViewProps } from '../nodes/FieldView';
+import { FieldViewProps, FocusViewOptions } from '../nodes/FieldView';
 import { FormattedTextBox } from '../nodes/formattedText/FormattedTextBox';
 import { StyleProp } from '../StyleProvider';
 import { CollectionMasonryViewFieldRow } from './CollectionMasonryViewFieldRow';
@@ -225,6 +225,7 @@ export class CollectionStackingView extends CollectionSubView<Partial<collection
 
     componentWillUnmount() {
         super.componentWillUnmount();
+        this.observer.disconnect();
         Object.keys(this._disposers).forEach(key => this._disposers[key]());
     }