nodevectors not returning all nodes

Question

I'm trying to use nodevector's Node2Vec class to get an embedding for my graph. I can't show the entire code, but basically this is what I'm doing:

import networkx as nx
import pandas as pd
import nodevectors

n2v = nodevectors.Node2Vec(n_components=128,
                           walklen=80,
                           epochs=3,
                           return_weight=1,
                           neighbor_weight=1,
                           threads=4)
G = nx.from_pandas_edgelist(df, 'customer', 'item', edge_attr='weight', create_using=nx.Graph)
n2v.fit(G)
model = n2v.model
shape = model.ww.vectors.shape

I know G has all the nodes from my scope. Then, I fit the model, but model.ww.vectors has a number of rows smaller than my number of nodes.

I'm not successfully finding why do the number of nodes represented in my embedding by model.ww.vectors is lower than my actual number of nodes in G.

Does anyone know why it happens?