Dyson Outsize Plus Wobbly Pole

I bought an Outsize Plus from QVC. The day it came in the mail, I discovered the button on top of the vacuum was broken. Dyson sent me a replacement, but now I’m concerned there’s an issue with this one. I can’t remember if the original one I received did this. When I put the corner attachment on the long pole, it doesn’t have a nice, snug fit feeling. The long pole wobbles back and forth, making it difficult to maneuver small places. I find myself stabilizing the pole with one hand and holding the vacuum with the other. Anyone have this vacuum, and can tell me if this is normal for this model? I can’t imagine this is normal, but the thought of another defective vacuum is disappointing. Thanks for your help!