Those flat periods you mentioned where not there on the version 1.16 Z12. There were flat periods but at other times. It happens, but this one is long.
I am relieved that I am not the only one seeing all this (misery likes company
) But I don't think I can turn on my live real money Z12 (or Z3) until something positive is demonstrated. That'll take many months from this point. Long live Z5.