[Python] Python: Labels are only printing for half of my Confusion Matrix in Seaborn

I'm trying to visualize a confusion matrix for the output of a classification algorithm, but Seaborn is only printing the labels of the top half of my confusion matrix, as such:

CM with missing labels

As you can see, there are no labels in the positives row, even though the test (y_test) set does, in fact, have 240 positives in it.

My code for generating the CM is as follows:

cm = confusion_matrix(y_test, y_pred)

plt.figure(figsize=(8, 6))
sns.set_theme(style="whitegrid")
sns.heatmap(cm, annot=True, fmt="d", cmap = "Blues")
plt.title('Confusion Matrix - XGBoost with SMOTE')
plt.xlabel('Predicted')
plt.ylabel('Actual')
plt.show()


Any insight or help on why the labels are missing from the confusion matrix? Whatever thoughts you have would be much appreciated!

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