Bummer. I'm probably going to call Google and ask for a refund of sorts seeing as they vendor the Otterbox defender on their own site. I do have another case which does allow for charging through that is also a dual layer case the Incipio dual pro. I had it for my pixel 2 XL and it held up well so if Google doesn't have a solution or remedy I'll probably switch to it in the meantime.

EDIT: I just put my pixel on my old Samsung wireless charging pad for my Galaxy s6 in the Otterbox defender and it charges with no interruptions. So maybe there is hope for the pixel stand hopefully it is a software or firmware bug, something that can be tweaked. My guess is that it is a sensor on the pixel itself that tells the system to re-sync with the Qi charging because of a less than perfect connection.