diff --git a/theatre/core/src/sheetObjects/SheetObjectTemplate.test.ts b/theatre/core/src/sheetObjects/SheetObjectTemplate.test.ts
index 663d2fd..091c0d4 100644
--- a/theatre/core/src/sheetObjects/SheetObjectTemplate.test.ts
+++ b/theatre/core/src/sheetObjects/SheetObjectTemplate.test.ts
@@ -22,9 +22,8 @@ describe(`SheetObjectTemplate`, () => {
             obj: {
               trackIdByPropPath: {
                 [encodePathToProp(['position', 'x'])]: asSequenceTrackId('x'),
-                [encodePathToProp(['position', 'invalid'])]: asSequenceTrackId(
-                  'invalidTrack',
-                ),
+                [encodePathToProp(['position', 'invalid'])]:
+                  asSequenceTrackId('invalidTrack'),
               },
               trackData: {
                 x: null as $IntentionalAny,
@@ -78,9 +77,8 @@ describe(`SheetObjectTemplate`, () => {
             obj: {
               trackIdByPropPath: {
                 [encodePathToProp(['position', 'x'])]: asSequenceTrackId('x'),
-                [encodePathToProp(['position', 'invalid'])]: asSequenceTrackId(
-                  'invalidTrack',
-                ),
+                [encodePathToProp(['position', 'invalid'])]:
+                  asSequenceTrackId('invalidTrack'),
               },
               trackData: {
                 x: null as $IntentionalAny,
@@ -91,6 +89,7 @@ describe(`SheetObjectTemplate`, () => {
         },
       })
 
+      debugger
       const iter = iterateOver(
         obj.template.getMapOfValidSequenceTracks_forStudio(),
       )
diff --git a/theatre/core/src/sheetObjects/getPropDefaultsOfSheetObject.ts b/theatre/core/src/sheetObjects/getPropDefaultsOfSheetObject.ts
index 3b7163b..10ac177 100644
--- a/theatre/core/src/sheetObjects/getPropDefaultsOfSheetObject.ts
+++ b/theatre/core/src/sheetObjects/getPropDefaultsOfSheetObject.ts
@@ -19,7 +19,7 @@ const cachedDefaults = new WeakMap<PropTypeConfig, SerializableValue>()
 export default function getPropDefaultsOfSheetObject(
   config: SheetObjectConfig<$IntentionalAny>,
 ): SerializableMap {
-  return getDefaultsOfPropTypeConfig(config.props) as $IntentionalAny
+  return getDefaultsOfPropTypeConfig(config) as $IntentionalAny
 }
 
 function getDefaultsOfPropTypeConfig(