4 reflashes? You may have faulty SD card then.
Highly doubt that; they ship a brand-new industrial microSD. It's possible that @brain brain just used the wrong image in one of the 4 attempts and / or plugged the card too quickly and / or messed up the wiring when playing around with swapping hashboards and controllers, etc. etc. etc...
Yes this is much likely

Even normal chinese SD cards last years and years for me, some Raspberry Pis with random ebay or whatever SD cards have been up for 5 or more years and not a single issue.