diff --git a/frontend/src/app/components/mempool-blocks/mempool-blocks.component.ts b/frontend/src/app/components/mempool-blocks/mempool-blocks.component.ts
index 487659896..8fa6ceb75 100644
--- a/frontend/src/app/components/mempool-blocks/mempool-blocks.component.ts
+++ b/frontend/src/app/components/mempool-blocks/mempool-blocks.component.ts
@@ -35,8 +35,9 @@ export class MempoolBlocksComponent implements OnInit, OnDestroy {
   ngOnInit() {
     this.mempoolBlocksSubscription = this.stateService.mempoolBlocks$
       .subscribe((blocks) => {
-        this.mempoolBlocksFull = JSON.parse(JSON.stringify(blocks));
-        this.mempoolBlocks = this.reduceMempoolBlocksToFitScreen(blocks);
+        const stringifiedBlocks = JSON.stringify(blocks);
+        this.mempoolBlocksFull = JSON.parse(stringifiedBlocks);
+        this.mempoolBlocks = this.reduceMempoolBlocksToFitScreen(JSON.parse(stringifiedBlocks));
         this.calculateTransactionPosition();
       });
 
diff --git a/frontend/src/app/components/time-since/time-since.component.ts b/frontend/src/app/components/time-since/time-since.component.ts
index 0b89e52cc..62ba9009e 100644
--- a/frontend/src/app/components/time-since/time-since.component.ts
+++ b/frontend/src/app/components/time-since/time-since.component.ts
@@ -1,11 +1,11 @@
-import { Component, OnInit, OnDestroy, ChangeDetectionStrategy, Input, ChangeDetectorRef } from '@angular/core';
+import { Component, OnInit, OnDestroy, ChangeDetectionStrategy, Input, ChangeDetectorRef, OnChanges } from '@angular/core';
 
 @Component({
   selector: 'app-time-since',
   template: `{{ text }}`,
   changeDetection: ChangeDetectionStrategy.OnPush
 })
-export class TimeSinceComponent implements OnInit, OnDestroy {
+export class TimeSinceComponent implements OnInit, OnChanges, OnDestroy {
   interval: number;
   text: string;
 
@@ -17,13 +17,17 @@ export class TimeSinceComponent implements OnInit, OnDestroy {
   ) { }
 
   ngOnInit() {
-    this.text = this.calculate();
     this.interval = window.setInterval(() => {
       this.text = this.calculate();
       this.ref.markForCheck();
     }, 1000 * (this.fastRender ? 1 : 60));
   }
 
+  ngOnChanges() {
+    this.text = this.calculate();
+    this.ref.markForCheck();
+  }
+
   ngOnDestroy() {
     clearInterval(this.interval);
   }