RRD? Only 1 symptom

Is this RRD? I found this branch growing off the main can of a young Autumn Damask this morning. The diameter is smaller then the main chain but it has grown quickly. There is no red growth or witches broom but an insane amount of pliable thorns. I’m thinking I should just bag the rose unless someone knows if this is something ADs do on occasion. Thanks in advance.