different default order of MATCH in 2.5.1 and 2.6.0

[randomJoe211]

When running:

MATCH (a:player)-[r]->() \
        WHERE id(a) == "player100" \
        RETURN labels(a),  keys(r);

a dozen of times, 2.6.0 always shows:

But 2.5.1 always shows:

Although there is no ORDER BY, the default order should not change, right?