My experience is that SSD also can work while moving them, like extreme cases as using them while you walk on street (connected to a mobile phone as external memory with tons of Videos & songs).
So position and also movement (with low G's and no impacts) does not affect them.
But after passing airport scanner, mine stated to give read and write errors (some sectors are impossible to be read again and neither write to them), so i through it to trash, no solution.
With other SSDs i have, i got weird things, like this: having SSD with Linux OS or just data, no read errors, then, after cleaning the SSD, i clone my Windows boot partition onto the SSD, then i get irrecorable read errors, but not allways the same number of them; after cleaning the SSD and putting other type of data no read errors again.. the weird thing is that i can reproduce the weird thing.
In other words, if i put some sets of data (specific secuences of bits) it gives read errors, but no write errors and no sectors rellocated count on smart data, etc. And number of errors varies from 2 to 24 and allways if a sector has an error the next also get error (two consecutive sectors), like if all errors are of 1KiB, not 512 bytes.
It is like SSD can not hold some sort of values on some specific possitions, but that is really weird.