I think this is just a wild guess.
I really doubt the compiler has anything to do with the antivirus.
Plus, at home I have no antivirus and I still see the problem, but not that often as I see it at my workplace. Maybe also because at home, my projects are only 30% in size compared with we have at the workplace.
The OS version seems ALSO to be irrelevant. It manifests on Win7 and Win10.
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For the moment, my workplace switched back to a much older version of Delphi. I don't even know why they keep paying the subscription.
SOON they will need the managed records! Let's see what happens then...
Anyway, my boss will never send the 1 mill lines of code to Emba. And I do understand him....
As I said previously, in cases like this, Emba could easily find more info about this bug by keeping some disk log-files (instead of asking our code).