Retzius, the K-5 series also had reports of this. I got one anyway and never encountered the problem. I’m not sure how many cameras there are that don’t have a considerable flaw – pick your brand, and you either get mirrors dropping out, oil splatter on sensor, shutter shock at certain frequently used shutter speeds, light leaks, the list goes on.
It’s a bit like the real water pub: “We’ve got underexposing cameras, overexposing cameras, poorly white-balancing cameras, non-waterproof waterproof cameras, shallow DoF cameras, deep DoF cameras, fixed focal length cameras, crappy zoom cameras, diffraction-limited cameras, cameras with poor built-in flash, cameras without built-in flash, cameras without hotshoe, cameras without viewfinder, cameras without tiltable screen, cameras with poor battery life. We’ve got faulty cameras, broken cameras, and verboten cameras, we’ve got…”
Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work.