android different applicationId & applicationIdSuffix by flavors chains

I have 2 target android flavor, with 2 different customer flavor. I need:

1. first target with an appId and different suffix by customer
2. second target with a different appId without any suffix.

My tries:

flavorDimensions "customer","target"
productFlavors {
    customerA {
        dimension "customer"
        applicationId = "com.mycompany.oldappname.customerA"
    }
    customerB {
        dimension "customer"
        applicationId = "com.mycompany.oldappname.customerB"
    }
    targetA{
        dimension "target"
    }
    targetB{
        applicationId = "com.mycompany.newappname"
    }
}

it doesn't work on targetB. I get appId defined in dimension customer, not the one in dimension target.

And I tried:

defaultConfig {
    applicationId "com.mycompany.newappname"
}
...
flavorDimensions "customer","target"
productFlavors {
    customerA {
        dimension "customer"
        applicationIdSuffix = ".customerA"
    }
    customerB {
        dimension "customer"
        applicationIdSuffix = ".customerB"
    }
    targetA{
        dimension "target"
    }
    targetB{
        applicationIdSuffix = ""
        applicationId = "com.mycompany.oldappname"
    }
}

but I get on resulting targetB appId= "com.mycompany.oldappname.customerB"

EDIT

I have specialized code in folders java/res of companyA/companyB needed both for targetA and targetB

from android different applicationId & applicationIdSuffix by flavors chains