diff --git a/src/common/cluster/cluster.ts b/src/common/cluster/cluster.ts
index 561074a030..cdadd4d3b4 100644
--- a/src/common/cluster/cluster.ts
+++ b/src/common/cluster/cluster.ts
@@ -379,7 +379,11 @@ export class Cluster implements ClusterModel, ClusterState {
   /**
    * @internal
    */
-  @action disconnect() {
+  @action disconnect(): void {
+    if (this.disconnected) {
+      return void logger.debug("[CLUSTER]: already disconnected", { id: this.id });
+    }
+
     logger.info(`[CLUSTER]: disconnecting`, { id: this.id });
     this.eventsDisposer();
     this.contextHandler?.stopServer();
diff --git a/src/common/utils/__tests__/formatDuration.test.ts b/src/common/utils/__tests__/formatDuration.test.ts
index a10818ab2b..3c42db9060 100644
--- a/src/common/utils/__tests__/formatDuration.test.ts
+++ b/src/common/utils/__tests__/formatDuration.test.ts
@@ -55,7 +55,7 @@ describe("human format durations", () => {
     });
 
     test("durations less than 8 years returns years and days", () => {
-      const timeValue = Date.now() - new Date(moment().subtract(2, "years").subtract(5, "days").subtract(2, "hours").toDate()).getTime();
+      const timeValue = new Date(2020, 0, 10, 12, 0, 0, 0).getTime() - new Date(2018, 0, 4, 12, 0, 0, 0).getTime();
 
       const res = formatDuration(timeValue);
 
diff --git a/src/renderer/components/+preferences/editor.tsx b/src/renderer/components/+preferences/editor.tsx
index 2f3e03fff5..fe1f4ca602 100644
--- a/src/renderer/components/+preferences/editor.tsx
+++ b/src/renderer/components/+preferences/editor.tsx
@@ -85,7 +85,6 @@ export const Editor = observer(() => {
         <Input
           theme="round-black"
           type="text"
-          validators={InputValidators.isNumber}
           value={editorConfiguration.fontFamily}
           onChange={value => editorConfiguration.fontFamily = value}
         />