diff --git a/src/widgets/call-panel.jsx b/src/widgets/call-panel.jsx
index 4f3762be..55fef792 100644
--- a/src/widgets/call-panel.jsx
+++ b/src/widgets/call-panel.jsx
@@ -175,6 +175,23 @@ class CallPanel extends React.PureComponent {
         this.containerRef.current.style.cursor = 'grab';
       }
     };
+    // dragStart's inline left/top/right (set the first time the minimized bubble is dragged, see
+    // above) always win over base.css's #video-container.minimized:not(.audio-minimized) mobile
+    // rule -- inline style beats any stylesheet selector regardless of media query. A desktop user
+    // who drags the bubble somewhere and then narrows the window below 640px (a real everyday
+    // action -- snapping the browser to half the screen, say) would otherwise be stuck with the
+    // bubble pinned at its old desktop-width position/size instead of docking as the intended
+    // mobile full-width strip. Clearing the manual offsets once the mobile breakpoint applies lets
+    // the stylesheet rule take back over; harmless (a no-op) whenever nothing was ever dragged.
+    this.handleWindowResize = () => {
+      if (this.props.minimized && this.containerRef && this.containerRef.current &&
+          window.matchMedia('(width<=640px)').matches) {
+        const el = this.containerRef.current;
+        el.style.removeProperty('left');
+        el.style.removeProperty('right');
+        el.style.removeProperty('top');
+      }
+    };
   }
 
   componentDidMount() {
@@ -191,6 +208,7 @@ class CallPanel extends React.PureComponent {
       this.containerRef.current.addEventListener('pointermove', this.drag);
       this.containerRef.current.addEventListener('pointerup', this.dragEnd);
     }
+    window.addEventListener('resize', this.handleWindowResize);
   }
 
   componentWillUnmount() {
@@ -199,6 +217,7 @@ class CallPanel extends React.PureComponent {
     topic.onInfo = this.previousOnInfo;
     this.stop();
 
+    window.removeEventListener('resize', this.handleWindowResize);
     if (this.containerRef) {
       this.containerRef.current.removeEventListener('pointerdown', this.dragStart);
       this.containerRef.current.removeEventListener('pointermove', this.drag);