Hey Ho Paul
I have very good news on this oddity you so graciously reported.
And my humblest thanks for putting me onto it.
For sure you are spot on, it does indeed exist and so you are definitely not going crazy and is actually without any describable pattern.
For sure it is one of the worst and most horrible bugs to track down in being one that affects only a few units and occurs totally at random.
For us fixing any bug is very satisfying, but somehow these more difficult ones are even more so
It is not totally found and fixed yet, but me and Mattia worked real hard today to beat this beast of a bug into a very tight corner and we would already have had it beaten if my ISP did not play up this afternoon. I seriously doubt it will survive past tomorrow.

