Maps marker point image with picasso not loaded at first time

I'm implementing android Mapview with Custom marker. I'm using picasso to load image into marker view. And when i launch the app at the first time, it shows me all the markers, but only one marker that has loaded from database with picasso, the other markers are not loaded from database, they only show me the default maps marker pin. But when i go to the previous activity and go back into MapsActivity, it shows me all the markers that loaded from database with picasso.

Here's my PicassoMarker class

public class PicassoMarker implements Target {
Marker mMarker;

    PicassoMarker(Marker marker) {
        mMarker = marker;
    }

    @Override
    public int hashCode() {
        return mMarker.hashCode();
    }

    @Override
    public boolean equals(Object o) {
        if(o instanceof PicassoMarker) {
            Marker marker = ((PicassoMarker) o).mMarker;
            return mMarker.equals(marker);
        } else {
            return false;
        }
    }

    @Override
    public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
        mMarker.setIcon(BitmapDescriptorFactory.fromBitmap(bitmap));
    }

    @Override
    public void onBitmapFailed(Drawable errorDrawable) {
    }

    @Override
    public void onPrepareLoad(Drawable placeHolderDrawable) {
        //mMarker.setIcon(BitmapDescriptorFactory.fromResource(R.mipmap.here));
    }
}

Here's the method in MapsActivity

public void plotMarkers(ArrayList<MyMarker> markers) {
    if(markers.size() > 0) {
        for (MyMarker myMarker : markers)
        {
            markerOption = new MarkerOptions().position(new LatLng(myMarker.getmLatitude(), myMarker.getmLongitude()));
            location_marker = mMap.addMarker(markerOption);
            target = new PicassoMarker(location_marker);
            Picasso.with(MapsActivity.this).load(myMarker.getmIcon()).resize(84, 125).into(target);
            mMarkersHashMap.put(location_marker, myMarker);

            i = getIntent();
            if(i.getBooleanExtra("maps", true)) {
                buttonNavigasi.setVisibility(View.VISIBLE);

                location_marker.setTitle(i.getStringExtra("nama"));
                dest = new LatLng(myMarker.getmLatitude(), myMarker.getmLongitude());
                mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(dest, 16));
            }
            else {
                mMap.setInfoWindowAdapter(new MarkerInfoWindowAdapter());
            }
        }
    }
}

What's going wrong here?

Thanks.