I ran into the same sort of venting issues with the 2.0. The problem is that the lower edge is flatter than the smaller plugs, and forms a more effective seal.
The short term fix is to reach around now and then and rock the handle back up towards your tailbone to break the seal.
And I’m happy to report that with plenty of practice you can get enough awareness and control/relaxation there to be able to vent naturally. So keep at it, 2.0 fans 🙂