我怀疑你发布的代码是否使视图变成了gone。如果我们将代码反编译为Java，我们会看到以下内容：

public final void addToRoot(@NotNull View view) {
      Intrinsics.checkNotNullParameter(view, "view");
      View var10000 = this.findViewById(16908290);
      if (var10000 == null) {
         throw new NullPointerException("null cannot be cast to non-null type android.view.ViewGroup");
      } else {
         ((ViewGroup)var10000).addView(view);
      }
   }

   public final void removeFromRoot(@NotNull View view) {
      Intrinsics.checkNotNullParameter(view, "view");
      View var10000 = this.findViewById(16908290);
      if (var10000 == null) {
         throw new NullPointerException("null cannot be cast to non-null type android.view.ViewGroup");
      } else {
         ((ViewGroup)var10000).removeView(view);
      }
   }

我猜这看起来与忽略Kotlin引入的检查的Java代码非常相似。