QQ on Apple Watch

I have like a lot of contacts on QQ before and the notifications are all not muted, BTW. so recently I bought an apple watch and I downloaded the QQ on it. when I open it, there’s only one contact in it. the strange thing is, I can receive notifications from, say, a particular group, on the watch, but when I open QQ on the watch, the icon of that group doesn’t pop up, and there’s still only that previous contract there, alone. this means I can’t reply to messages from other people other than this person, although everything works fine for this person, e.g. typing. it’s just that there’s no other contacts on this watch

I just went and deleted the app and downloaded it again, but it still doesn’t work, anybody know why’s it so?