I've had this problem with my 155 (and not my 185), and have seen the same issue reported by other Wave users. When you put in the dry filter, try not to press it down too much, and start the rinse by pouring in the center. Alternatively you can try to lift it up after you've added the dry grounds to make sure it's not too flush against the drain holes when you actually start brewing. A more permanent fix could be to purchase a metal mesh screen and cut out a circle just big enough to fit in the bottom of the brewer so as to prevent the filter from suctioning against the drain holes. Also, I use a cloth filter primarily and this also solves the issue, though changes brew characteristics as well so may not be the ideal fix for others.