Library blocks the ui when making a task from its data

[alicansekban]

So what am trying to do here is, i take 3 routes from the map when user chooses a location to go, from these routes i take all the pins
and compare them with my pin list(i take it from our backend) for calculating toll price. But when i try to do this on background with another thread using coroutine, library wouldnt allow me to do and gives a crash or when i try to do it foreground it freezes the ui of course.

What am i suppose to do here ?

this is my method for comparing lists and posting them on our api.

private fun calculateTollPrice(routes: List) {

    val highwayTollList = retrieveDataModelSharedPref(
        "PIN_TOLL_LIST",
        PinTollListResponse::class.java
    )
    val vehicleType = SPUtils.getInstance().getInt(SPPARAM.VEHICLE_TYPE)
    var tmpTollPointLoc: Point
    routes.forEachIndexed { index, drivingRoute ->
        if (drivingRoute.metadata.flags.hasTolls) {
            drivingRoute.geometry.points.forEach { point ->
                tollList.addAll(highwayTollList?.items?.filter { tollItem ->
                    tmpTollPointLoc = Point(tollItem.latitude, tollItem.longitude)
                    val distance = Geo.distance(tmpTollPointLoc, point)
                    distance < tollItem.radius
                } ?: emptyList()
                )
            }
            viewModel.calculateTollPrice(
                CalculateTollPriceRequest(
                    tollList.distinctBy { it.id },
                    index,
                    tollList.count(),
                    vehicleType
                )
            )
            tollList.clear()
        }

    }
}

[YandexMapKit]

Can you specify more precisely which line leads to a crash?