I have the Beta 14 2017 (all plastic, twist off cap) air filter housing.
It doesn't fit the engines inlet stub properly, a diagonal piece of plastic has been hacked off the filter connector to allow it to be compressed further - but it often falls off (despite the plastic liner being in place).
As the filter is expensive and the engine location is dry, I'm considering binning the filter housing for a metal & foam filter (K&N type). I did ask the manufacturer, but they can only sell me the same problematic housing I already have.
