diff --git a/packages/SystemUI/src/com/android/systemui/bubbles/BubbleExpandedView.java b/packages/SystemUI/src/com/android/systemui/bubbles/BubbleExpandedView.java
index 0d5261dcb7f33..fe191f40d31fb 100644
--- a/packages/SystemUI/src/com/android/systemui/bubbles/BubbleExpandedView.java
+++ b/packages/SystemUI/src/com/android/systemui/bubbles/BubbleExpandedView.java
@@ -294,7 +294,8 @@ public class BubbleExpandedView extends LinearLayout implements View.OnClickList
         ta.recycle();
 
         mPointerDrawable.setTint(bgColor);
-        if (ScreenDecorationsUtils.supportsRoundedCornersOnWindows(mContext.getResources())) {
+        if (mActivityView != null && ScreenDecorationsUtils.supportsRoundedCornersOnWindows(
+                mContext.getResources())) {
             mActivityView.setCornerRadius(cornerRadius);
         }
     }
diff --git a/packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java b/packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java
index bce172b891872..557d1bb0ae52d 100644
--- a/packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java
+++ b/packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java
@@ -528,6 +528,12 @@ public class BubbleStackView extends FrameLayout {
         mBubbleContainer.addView(mOverflowBtn, 0,
                 new FrameLayout.LayoutParams(WRAP_CONTENT, WRAP_CONTENT));
 
+        setOverflowBtnTheme();
+        mOverflowBtn.setVisibility(GONE);
+    }
+
+    // TODO(b/149146374) Propagate theme change to bubbles in overflow.
+    private void setOverflowBtnTheme() {
         TypedArray ta = mContext.obtainStyledAttributes(
                 new int[]{android.R.attr.colorBackgroundFloating});
         int bgColor = ta.getColor(0, Color.WHITE /* default */);
@@ -537,8 +543,6 @@ public class BubbleStackView extends FrameLayout {
         ColorDrawable bg = new ColorDrawable(bgColor);
         AdaptiveIconDrawable adaptiveIcon = new AdaptiveIconDrawable(bg, fg);
         mOverflowBtn.setImageDrawable(adaptiveIcon);
-
-        mOverflowBtn.setVisibility(GONE);
     }
 
     void showExpandedViewContents(int displayId) {
@@ -568,6 +572,9 @@ public class BubbleStackView extends FrameLayout {
      */
     public void onThemeChanged() {
         setUpFlyout();
+        if (BubbleExperimentConfig.allowBubbleOverflow(mContext)) {
+            setOverflowBtnTheme();
+        }
     }
 
     /** Respond to the phone being rotated by repositioning the stack and hiding any flyouts. */