diff --git a/core/static/bundled/core/components/include-index.ts b/core/static/bundled/core/components/include-index.ts
index fa046850..9ee44bb8 100644
--- a/core/static/bundled/core/components/include-index.ts
+++ b/core/static/bundled/core/components/include-index.ts
@@ -84,11 +84,7 @@ const refreshElement = <
       return;
     }
 
-    // This might be called at some bad timing
-    // This prevents crashes of the observer
-    if (element.refresh) {
-      element.refresh();
-    }
+    element.refresh();
   }
 };
 
@@ -134,7 +130,7 @@ startObserver(observer);
 export class LinkOnce extends elementOnce("link") {
   getElementQuerySelector(): string {
     // We get href from node.attributes instead of node.href to avoid getting the domain part
-    return `link[href='${this.node.attributes.getNamedItem("href")?.nodeValue}']`;
+    return `link[href='${this.node.attributes.getNamedItem("href").nodeValue}']`;
   }
 }
 
@@ -146,6 +142,6 @@ export class LinkOnce extends elementOnce("link") {
 export class ScriptOnce extends inheritHtmlElement("script") {
   getElementQuerySelector(): string {
     // We get href from node.attributes instead of node.src to avoid getting the domain part
-    return `script[src='${this.node.attributes.getNamedItem("src")?.nodeValue}']`;
+    return `script[src='${this.node.attributes.getNamedItem("src").nodeValue}']`;
   }
 }
diff --git a/core/static/bundled/core/components/tabs-index.ts b/core/static/bundled/core/components/tabs-index.ts
index 7bd85998..260467d5 100644
--- a/core/static/bundled/core/components/tabs-index.ts
+++ b/core/static/bundled/core/components/tabs-index.ts
@@ -28,7 +28,7 @@ export class Tab extends HTMLElement {
     return html`
     	<button
 	    	role="tab"
-	    	?aria-selected=${this.active}
+	    	?aria-selected="${this.active}"
     		class="tab-header clickable ${this.active ? "active" : ""}"
     		@click="${() => this.setActive(true)}"
     	>
@@ -40,7 +40,7 @@ export class Tab extends HTMLElement {
     return html`
     	<section
     		class="tab-section"
-    		?hidden=${!this.active}
+    		?hidden="${!this.active}"
     	>
 	    	${unsafeHTML(this.getContentHtml())}
 	    </section>
diff --git a/core/static/bundled/utils/web-components.ts b/core/static/bundled/utils/web-components.ts
index d7792e76..b1dac189 100644
--- a/core/static/bundled/utils/web-components.ts
+++ b/core/static/bundled/utils/web-components.ts
@@ -47,9 +47,18 @@ export function inheritHtmlElement<K extends keyof HTMLElementTagNameMap>(tagNam
     implements InheritedHtmlElement<K>
   {
     readonly inheritedTagName = tagName;
+    private readonly initializedAttribute = "component-initialized";
     node: HTMLElementTagNameMap[K];
 
     connectedCallback(autoAddNode?: boolean) {
+      // When nesting inherited elements, we might trigger the wrapping twice
+      // To avoid this, we tag a created element as initialized
+      // We then skip the initialization step and grab the inner content as the node
+      if (this.hasAttribute(this.initializedAttribute)) {
+        this.node = this.firstChild as HTMLElementTagNameMap[K];
+        return;
+      }
+
       this.node = document.createElement(this.inheritedTagName);
       const attributes: Attr[] = []; // We need to make a copy to delete while iterating
       for (const attr of this.attributes) {
@@ -58,6 +67,8 @@ export function inheritHtmlElement<K extends keyof HTMLElementTagNameMap>(tagNam
         }
       }
 
+      this.setAttribute(this.initializedAttribute, "");
+
       // We move compatible attributes to the child element
       // This avoids weird inconsistencies between attributes
       // when we manipulate the dom in the future