Diva Disc - Leaking

Switch to the diva disc, day one and not off to a great start coz of leaking, wondering if its coz the size might be too small, or its because of that shield thing. I find close to nothing in the disc. Anybody else having leaking issues with the diva disc? Am i dojng something wrong?

Used another brand last month ( first time using the disc actually) and went AMAZING. No leaking whatsoever. Only reason i changed coz it had no string, pull out thing… removing it was challenge and a half!