diff --git a/src/components/JSONViewer/NotebookParamsCell.tsx b/src/components/JSONViewer/NotebookParamsCell.tsx
index 0c62ad3f..042953b1 100644
--- a/src/components/JSONViewer/NotebookParamsCell.tsx
+++ b/src/components/JSONViewer/NotebookParamsCell.tsx
@@ -197,7 +197,7 @@ const NotebookParamsCell = ({
 		const paramsWithType = Object.fromEntries(
 			paramsValue
 				.filter(filterParameters)
-				.map(({ name, type, value }) => [name, convertParameterValue(value, type)]),
+				.map(({ name, type: paramType, value }) => [name, convertParameterValue(value, paramType)]),
 		);
 		const res = await api.jsonViewer.launchNotebook(notebook.name, paramsWithType);
 		if (res.task_id !== '') {
diff --git a/src/stores/JSONViewer/JSONViewerStore.ts b/src/stores/JSONViewer/JSONViewerStore.ts
index 05e61ed9..300efb03 100644
--- a/src/stores/JSONViewer/JSONViewerStore.ts
+++ b/src/stores/JSONViewer/JSONViewerStore.ts
@@ -394,9 +394,9 @@ export class JSONViewerStore {
 		const nextId = this.treeNodes[type].find(
 			node => node.displayTimestamp && node.displayTimestamp >= timestamp,
 		);
-		const prevId = this.treeNodes[type].findLast(
-			node => node.displayTimestamp && node.displayTimestamp <= timestamp,
-		);
+		const prevId = this.treeNodes[type]
+			.reverse()
+			.find(node => node.displayTimestamp && node.displayTimestamp <= timestamp);
 		return {
 			prevId: prevId ? prevId.id : '',
 			nextId: nextId ? nextId.id : '',