diff --git a/app/assets/stylesheets/responsive.css b/app/assets/stylesheets/responsive.css
index ce7512619..e8a031008 100644
--- a/app/assets/stylesheets/responsive.css
+++ b/app/assets/stylesheets/responsive.css
@@ -867,6 +867,11 @@
     inset-block-start: 64px;
   }
 
+  /* Offset sticky issue list headers below the fixed mobile header. */
+  table.list.sticky thead {
+    inset-block-start: 64px;
+  }
+
   /* Prevent content from being hidden behind #sticky-issue-header and project-jump when scrolling via anchor links. */
   .controller-issues.action-show div.wiki a[name],
   .controller-issues.action-show #history div[id^="note-"],
diff --git a/app/javascript/controllers/sticky_table_header_controller.js b/app/javascript/controllers/sticky_table_header_controller.js
index 202d4fe4b..dca61f16c 100644
--- a/app/javascript/controllers/sticky_table_header_controller.js
+++ b/app/javascript/controllers/sticky_table_header_controller.js
@@ -49,6 +49,8 @@ export default class extends Controller {
           this.stickyValue = false
         }
       })
+    }, {
+      rootMargin: `-${this.stickyTopOffset}px 0px 0px 0px`
     })
 
     this.resizeObserver = new ResizeObserver(() => {
@@ -66,6 +68,9 @@ export default class extends Controller {
   }
 
   syncWidth() {
+    const headRect = this.headTarget.getBoundingClientRect()
+
+    this.stickyHeader.style.insetInlineStart = `${headRect.left}px`
     this.stickyHeader.style.width = window.getComputedStyle(this.headTarget).width
     this.bodyColumns.forEach((col, i) => {
       const style = window.getComputedStyle(col)
@@ -90,10 +95,17 @@ export default class extends Controller {
   }
 
   get isIntersecting() {
-    return this.headTarget.getBoundingClientRect().top > 0
+    return this.headTarget.getBoundingClientRect().top > this.stickyTopOffset
   }
 
   get isHeaderOverflowX() {
     return this.element.scrollWidth > this.element.clientWidth
   }
+
+  get stickyTopOffset() {
+    this.prepare()
+
+    const top = window.getComputedStyle(this.stickyHeader).top
+    return top === "auto" ? 0 : parseFloat(top)
+  }
 }