试用了一下，有以下几个问题。

试用了一下，还有以下几个奇怪的问题：
1、超过5个，有时打开会挤在一起。
2、打开APP，第一个tab没有tabbar下面那个高亮块。
3、滑动过程中，tabbar偶尔跳跃闪动，不自然。
4、打开APP，tab页面有时不能刷新。

No file, test, or entry point is named. Reproduce the four reported tab-bar layout, highlighting, animation, and refresh symptoms in the React Native app, then locate the relevant tab implementation. Done means each reported behavior is corrected and verified on the affected app platforms.

Written by the indexing model from the issue text.