Room and RxJava Providing Inconsistent Results - rx-java2

Question

This is my first time working with Room and RxJava. I'm getting some very inconsistent results when I'm reading from the DB. I have a nested RecyclerView, where the first simply shows the days of the week and the second shows the forecast for each day.
Sometimes when I launch the app, everything shows up right away. Other times, only the days will be shown, but not the forecast for each day. Other times, neither RecyclerViews are shown. However, if I view the DB using Stetho, the data is there within the device.
Here's how I've setup my Dao:
#Dao
public interface MyDao {
// Other CRUD methods
#Query("SELECT DISTINCT date FROM my_table")
Single<List<LocalDate>> getUniqueDays();
#Query("SELECT * FROM my_table WHERE date == :localDate")
Single<List<Forecasts>> getForecastForDay(LocalDate localDate);
}
I populate the first RecyclerView using the following:
Single<List<LocalDate>> source = MyApp.getDatabase().getDao().getUniqueDays();
source.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new SingleObserver<List<LocalDate>>() {
#Override
public void onSubscribe(Disposable d) {
}
#Override
public void onSuccess(List<LocalDate> localDates) {
mAdapter.refreshData(localDates);
}
#Override
public void onError(Throwable e) {
}
});
This is called within a fragment that displays the days of the week.
Then, within the adapter for the days of the week, I also need to populate the inner RecyclerView, which is done within my bind() of the ViewHolder:
public void bind(LocalDate date, int position){
// A bunch of other views being set
mHourlyForecasts.setHasFixedSize(true);
LinearLayoutManager layoutManager = new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false);
mHourlyForecasts.setLayoutManager(layoutManager);
mAdapter = new HourlyForecastAdapter(mContext);
mHourlyForecasts.setAdapter(mAdapter);
Single<List<Forecasts>> source = MyApp.getDatabase().getDao().getForecastForDay(date);
source.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new SingleObserver<List<Forecasts>>() {
#Override
public void onSubscribe(Disposable d) {
}
#Override
public void onSuccess(List<Forecasts> conditions) {
Timber.i("Size of conditions in onSuccess(): %d", conditions.size());
mAdapter.refreshData(conditions);
}
#Override
public void onError(Throwable e) {
}
});
}
However, I have no idea as to why the data isn't being shown consistently. Sometimes at startup the data isn't shown, sometimes it is. Sometimes I'll close out the app and re-open it and some data is missing. Or all of it is there. And again, the data is there in the DB when I inspect the device in Stetho, it's just not being shown within the RecyclerView(s).
If anyone can provide some guidance on this, it would be immensely appreciated...