Radio Button is only partially checked

Question

I know this sound weird so here is the picture.

It hold the correct value. The correct radiobutton is (partially) selected. All logic in the OnCheckedChangeListener is executed correctly. I'm completly stunned. Why is the radio button not fully checked?

Only thing I can think of is that i'm using Rx2Firebase

periodRetriever = FirebaseHelper.getInstance(getContext()).getPeriod()
        .defaultIfEmpty(0)
        .distinctUntilChanged()
        .subscribe(new Consumer<Integer>() {
            @Override
            public void accept(@NonNull Integer headerType) throws Exception {
                getRadioViewChecked(headerType).setChecked(true);
            }
        });

EDIT1

Marcos suggestion I can't see the white tick. This is not the case.

EDIT2

Layout:

<RadioGroup
    android:id="@+id/rgPeriod"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <android.support.v7.widget.AppCompatRadioButton
        android:id="@+id/rbMonth"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="false"
        android:text="@string/month" />

    <android.support.v7.widget.AppCompatRadioButton
        android:id="@+id/rbWeek"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="false"
        android:text="@string/week" />

    <android.support.v7.widget.AppCompatRadioButton
        android:id="@+id/rb4Weeks"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="false"
        android:text="@string/four_weeks" />


</RadioGroup>

Answer 1

Looks like an Animation Bug. When using a CompoundButton on a Fragment inside a ViewPager the drawable state is not set correctly.

This happens also for Checkboxes as seen here: Android Nougat: Why do checkboxes on Fragment have incomplete state when selected programmatically (but look fine on Lollipop).

Calling jumpDrawablesToCurrentState() just after calling RadioGroup.check(id) or Checkbox.setChecked(true) seems to fix the problem (thx @Dalmas)