That looked exactly like the one I had mine replaced with so I went back and found my post about the problems I was having with my LNB since I recall mentioning the brands. I guess being on the wrong side of 40 is starting to show because I remembered it all wrong even though it has only been a month. My new one was an Eagle Aspen, your picture and mention of the three bubbles on the 99/101/103 cover jogged my memory. The old one was a WNC. I remember that one having three flat sort of chalky white covers. So I guess my installer has had the same experience with WNC LNBs that you have.
It's ironic since the reason I bought a new one to have it replaced is because I started having problems with channels on 103ca breaking up every once in a while, just like you reported. It worked fine 99% of the time, but every once in a while it have problems on 103, while 99 and 101 were never a problem.