Some apps can't connect over mobile data

[Jojo424]

after the android 9 update, Some of my apps can't connect over mobile data. Most apps can work, so its not connect issue. And those apps work on my other phone which is also updated to 9.

[Strampke]

Can you tell us which apps those are?

Maybe we can reproduce the behavior.

Maybe it is some setting.

[Jojo424]

Tencent QQ

Yi home

Amcrest link

And I am using T-mobile.