When XRecyclerView instance num > 1 in an Activity, First instance addHeaderView() num < Second instance, then App crashed!

[CigoZim]

When XRecyclerView instance num > 1 in an Activity, like this:
eg:
Two Fragment in one Activity:the First fragment has an XRecyclerView with do addHeaderView() one times, and the Second fragment has an XRecyclerView with do addHeaderView() two times, then App crashed!

So, I checked the class XRecyclerView, found that:
private static List<Integer> sHeaderTypes = new ArrayList<>();
So I remove the flag static, like this:
private List<Integer> sHeaderTypes = new ArrayList<>();

OK, well done, problem solved!