@nprofile1q... I think lately, the "dry ball" class of issues I've found on boards have usually been caused by, like, incomplete plugging of via-in-pad slurping the paste into the netherworld, or similar.
But yeah, Oxide's got some crazy stackups that really need to bake thoroughly, and we had some thermal inconsistencies in reflow early on. That one's at least easy to fix with heat.