diff --git a/extensions/default/src/getSopClassHandlerModule.js b/extensions/default/src/getSopClassHandlerModule.js
index b45a85134..7c312d7ef 100644
--- a/extensions/default/src/getSopClassHandlerModule.js
+++ b/extensions/default/src/getSopClassHandlerModule.js
@@ -48,12 +48,20 @@ function getDisplaySetInfo(instances) {
     let firstTimePointInstances;
 
     if (instances[0].NumberOfFrames > 1 && timePoints.length > 1) {
-      // handle multiframe dynamic volume
-      firstTimePointInstances = timePoints[0].map(imageId => metaData.get('instance', imageId));
+      // Handle multiframe dynamic volumes. Local file frame imageIds do not
+      // always resolve to a frame-level instance object, so keep resolved
+      // entries and fall back to the source multiframe instance when needed.
+      firstTimePointInstances = timePoints[0]
+        .map(imageId => metaData.get('instance', imageId))
+        .filter(Boolean);
+
+      if (!firstTimePointInstances.length) {
+        firstTimePointInstances = [instances[0]];
+      }
     } else {
       // O(n) to convert it into a map and O(1) to find each instance
       instances.forEach(instance => instancesMap.set(instance.imageId, instance));
-      firstTimePointInstances = timePoint.map(imageId => instancesMap.get(imageId));
+      firstTimePointInstances = timePoint.map(imageId => instancesMap.get(imageId)).filter(Boolean);
     }
     displaySetInfo = isDisplaySetReconstructable(firstTimePointInstances, appConfig);
   } else {
diff --git a/platform/app/src/App.tsx b/platform/app/src/App.tsx
index 446308d00..18393f643 100644
--- a/platform/app/src/App.tsx
+++ b/platform/app/src/App.tsx
@@ -184,12 +184,16 @@ App.propTypes = {
   config: PropTypes.oneOfType([
     PropTypes.func,
     PropTypes.shape({
-      routerBasename: PropTypes.string.isRequired,
+      routerBasename: PropTypes.string,
       oidc: PropTypes.array,
       whiteLabeling: PropTypes.object,
       extensions: PropTypes.array,
+      showLoadingIndicator: PropTypes.bool,
+      showStudyList: PropTypes.bool,
+      modes: PropTypes.array,
+      dataSources: PropTypes.array,
     }),
-  ]).isRequired,
+  ]),
   /* Extensions that are "bundled" or "baked-in" to the application.
    * These would be provided at build time as part of they entry point. */
   defaultExtensions: PropTypes.array,
diff --git a/platform/core/src/utils/isDisplaySetReconstructable.js b/platform/core/src/utils/isDisplaySetReconstructable.js
index 00decb83a..267df3b38 100644
--- a/platform/core/src/utils/isDisplaySetReconstructable.js
+++ b/platform/core/src/utils/isDisplaySetReconstructable.js
@@ -11,12 +11,14 @@ const iopTolerance = 0.01;
  * @param {Object[]} instances An array of `OHIFInstanceMetadata` objects.
  */
 export default function isDisplaySetReconstructable(instances, appConfig) {
-  if (!instances.length) {
+  const definedInstances = instances?.filter(Boolean) || [];
+
+  if (!definedInstances.length) {
     return { value: false };
   }
-  const firstInstance = instances[0];
+  const firstInstance = definedInstances[0];
 
-  const isMultiframe = firstInstance.NumberOfFrames > 1;
+  const isMultiframe = (firstInstance.NumberOfFrames || 0) > 1;
 
   if (appConfig) {
     const rows = toNumber(firstInstance.Rows);
@@ -30,16 +32,16 @@ export default function isDisplaySetReconstructable(instances, appConfig) {
   // in favor of the calculation by metadata (orientation and positions)
 
   // Can't reconstruct if we only have one image.
-  if (!isMultiframe && instances.length === 1) {
+  if (!isMultiframe && definedInstances.length === 1) {
     return { value: false };
   }
 
   // Can't reconstruct if all instances don't have the ImagePositionPatient.
-  if (!isMultiframe && !instances.every(instance => instance.ImagePositionPatient)) {
+  if (!isMultiframe && !definedInstances.every(instance => instance.ImagePositionPatient)) {
     return { value: false };
   }
 
-  const sortedInstances = sortInstancesByPosition(instances);
+  const sortedInstances = sortInstancesByPosition(definedInstances);
 
   return isMultiframe ? processMultiframe(sortedInstances[0]) : processSingleframe(sortedInstances);
 }
diff --git a/platform/ui-next/src/components/CinePlayer/CinePlayer.tsx b/platform/ui-next/src/components/CinePlayer/CinePlayer.tsx
index d7e5fa26d..c801886b2 100644
--- a/platform/ui-next/src/components/CinePlayer/CinePlayer.tsx
+++ b/platform/ui-next/src/components/CinePlayer/CinePlayer.tsx
@@ -103,9 +103,10 @@ const CinePlayer: React.FC<CinePlayerProps> = ({
             onOpenChange={setPopoverOpen}
           >
             <PopoverTrigger asChild>
-              <Button
-                variant="ghost"
-                className="h-full border-none bg-transparent p-0 hover:bg-transparent"
+              <div
+                role="button"
+                tabIndex={0}
+                className="h-full cursor-pointer border-none bg-transparent p-0"
               >
                 <Numeric.Container
                   mode="stepper"
@@ -129,7 +130,7 @@ const CinePlayer: React.FC<CinePlayerProps> = ({
                     </div>
                   </Numeric.NumberStepper>
                 </Numeric.Container>
-              </Button>
+              </div>
             </PopoverTrigger>
             <PopoverContent
               side="bottom"