I don't think it is an IB thing. When I pull up UVXY on my system, all that I see is UVXY1 (and UVXY2, UVXY3 which are adjusted back month contracts from previous splits).
1 contract of the new UVXY1 is equal to 25 UVXY. I don't see anything quoted other then these.
The Nasdaq link you had lists standard UVXY, but no quoted market, just a market for the UVXY1.