Such machines might have the potential to "remember" the last position of the dice. This possible pattern production would be something any casino would question, so the manufacturer must have been able to convince doubters.
One thing I am sure of is that players have tried to find a pattern. There are always some dumb-asses doing it, but also some sharp characters. I think by now some of the latter would have cracked it.
Any anecdotal-level observations you may make without tons of data are just going to mess with your head, worthless stuff. I suggest you give up trying to find patterns and just enjoy your play.
the next time Dame Fortune toys with your heart, your soul and your wallet, raise your glass and praise her thus: “Thanks for nothing, you cold-hearted, evil, damnable, nefarious, low-life, malicious monster from Hell!” She is, after all, stone deaf. ... Arnold Snyder