.. I mean that's an oversimplification of what I do, these custom machines can be very complex, but it very much feels like hunting down a 0.001% memory issue some days.

despite all efforts, computers are only as deterministic as the willingness of silicon to make sure all the 1s are actually 1s and 0s are 0s, and the fw does a good job at guiding the silicon at this job.

If sw works elsewhere, but not here, something on that server is fucky.