So sorry Guys and Girls
nothing so far is really solving the problem … and I am not sure, that a real "Deep Sleep function" really exists
My way by disable the "lock function" (which I missunderstood as "Deep Sleep" in cause of my small English) only "worked" for one and a half day - and the "not waking up" came back after next following night.
The box always wakes up when USB is plugged in …
It does not matter how much the batteries are charged ...
I do not think either, that there is a fault in the battery compartment
The mod keeps working fine al long as I keep using it at least every 30 minutes
Meanwhile I think, the fault can not get fixed by a new firmware update … and the box needs a new DNA-board instead. So I informed my Vendor (3Fvape). I sent a video, how the mod does not start with two sets of fully charged batteries, then start once - and does not start again with the other set. Then the box started with the first set - and no start with the set, that worked a minute before …