In the past, as in two years ago, or in the last 6 months or something? I'm just intersted that's all, as far as we are aware our E38 flashing is rock solid reliable with no special tricks or processes to be completed, just the normal key off countdown timer.
A few years ago I recall the E40 occasionally needed a power removal only after a full flash, we've had a couple of people say that, but that really is an odd occurance and hasn't been an issue for a while.