One app not connecting on One data sim

[caabdul]

I have Xiaomi A1 Plus with Android 7.1.2 and I have a complex problem.

I live in city1 and often move to city2, Also I have dataSim1 and dataSim2 for internet in my phone. I have installed a riding app "Careem" that worked fine in past but now has following issue;

When I am in city1, this app works fine but when I go to city2, this app does not connect to internet on dataSim1 but connects on dataSim2. When I go back to city1, this app still doesn't connect on dataSim1 but when I uninstall it and re-install it, it starts working on dataSim1.
But again when I move to city2, this problem cycle starts again.

Note: I use an app FakeGPS to control my GPS when I am in city2 and have to hire a ride for my family in city1.

Any clue?

 

[anon(10614692)]

The latest update seems to have caused a lot of issues. You need the developer's support for this go@careem.com