It's not impossible to have a drive appear unreliable in one machine and reliable in another (if you physically move it). There could be something electrically or mechanically wrong with the machine which causes a particular drive to malfunction more frequently.
If you see this repeatedly with one machine, I would definitely consider that it is the machine which is bad rather than the drives. A power supply may be insufficient to support the peak requirements of the drives, for example. A poor mounting structure might resonate or transfer vibration or shock into one or more drive slots from the environment.
Vibrations can be problematic in multi drive chassis. The more NAS rated drives are apparently rated specifically to deal better with vibrations and of course the NAS itself some isolate drives far better than others from each other.
It might seem minor, but just watch this rather old now but infamous video of Brendan Gregg shouting at HDDs causing significant drops in throughput:
https://www.youtube.com/watch?v=tDacjrSCeq4
If you see this repeatedly with one machine, I would definitely consider that it is the machine which is bad rather than the drives. A power supply may be insufficient to support the peak requirements of the drives, for example. A poor mounting structure might resonate or transfer vibration or shock into one or more drive slots from the environment.