I initially thought it was you wondering why it cut off the window borders, but then I saw that it actually did cut off a bit. Did you resize your window? OBS seems to be a little weird with that at times, and usually toggling the window capture in question fixes that. That, or opening the configuration window and just pressing OK again.
Second thing you could try is to right-click on it in Editing mode, and reset the size and the cropping. See if that does anything.
Could you post a link to the bingo thing you're trying to capture? I'd like to try it for myself as well.
EDIT: Did a little experimenting of my own. Try opening the Window Capture configuration window by doubleclicking on said source, and just closing it again by clicking on OK.