Thank you for confirming those.
I injected some stuff that should get rid of your issues but since the problem is so hard to replicate, it is harder to detect if these changes made the difference.
Hopefully, it won't happen again but I can't be 100% sure until you test your website for a while. Soon as you see this happening again (or not) please let me know and I will conduct a full debug process there where absolutely every operation will have to get logged. It will be a long process, it will take even more time than today.
Let's see how it goes, crossing fingers on this one.