I have same issue with a Falcon 64GB SSD. Until a month ago it had been rock solid for several years, Now it disappears and cannot be seen until I put the jumper on it, boot from USB and Clean/Flash it to firmware 1916, take off jumper, boot with USB of the "Boot CD Image
" and then Flash firmware 2030.
I restore Windows OS from backup onto drive and all works fine for a few days, and then it just disappears again.
I have run diagnostics on the disk and it never finds any errors or problems. Does the part of the SSD that stores the firmware just not able to save it's config anymore? The Clean function doesn't indicate any bad blocks, Is there any fix for this?