I think there is a problem in Z12+ and Z6+ regarding the time zone.
These strategies "live" in EST / Eastern Standard Time (New York) as it seems which is UTC-5.
Because of that the market closed trigger is active too late on Friday/Saturday and the market open trigger on Sunday/Monday is also too late when trading in Europe.
This leads to duplicated/multiplied price quotes before the weekend mode and missing prices and too late continuing trading after the weekend.

Here is an example of a Z12+ run:

Lookback in the log file:
[1870: Fri 26-02-27 13:00] (1.36290)
[1871: Fri 26-02-27 14:00] (1.36316)
[1872: Fri 26-02-27 15:00] (1.36395)
[1873: Fri 26-02-27 16:00] (1.36369)
[1874: Fri 26-02-27 17:00] (1.36369) <-- same price as before!
[1875: Fri 26-02-27 18:00] (1.36369) <-- same price as before!
[1876: Fri 26-02-27 19:00] (1.36369) <-- same price as before!
[1877: Sun 26-03-01 23:00] (1.36487)
[1878: Mon 26-03-02 00:00] (1.36584)

Trading:
[Fri 26-03-13 15:00] 9914 0 0/2 (1.37292)
[Fri 26-03-13 16:00] 9935 0 0/2 (1.37180)
[Fri 26-03-13 17:00] 9935 0 0/2 (1.37195)
[Fri 26-03-13 18:00] 9935 0 0/2 (1.37195)
[Fri 26-03-13 19:00] 9935 0 0/2 (1.37195)
Market closed on 03-14 01:00:03 (local 20:00) <-- local 20:00 is wrong! It probably was 2:00 in Germany on Saturday
Market open on 03-16 04:00:07 (local 23:00) <-- local 23:00 is wrong! It probably was 5:00 in Germany on Monday
[Fri 26-03-13 20:00] 9813 0 0/2 (1.37127)

In an additional test with Z12+ (started with EUR/USD set in Zorro) I checked the actual prices to be able to match the real German time. The lookback looked like this:
[4124: Fri 26-03-27 14:00] (1.15167)
[4125: Fri 26-03-27 15:00] (1.15062) <-- Friday 21:00 in Germany (close price 21:59)
[4126: Fri 26-03-27 16:00] (1.15062)
[4127: Fri 26-03-27 17:00] (1.15062)
[4128: Fri 26-03-27 18:00] (1.15062)
[4129: Fri 26-03-27 19:00] (1.15062)
[4130: Sun 26-03-29 23:00] (1.15153) <-- Monday 5:00 in Germany (close price 5:59)
[4131: Mon 26-03-30 00:00] (1.15133)
[4132: Mon 26-03-30 01:00] (1.15154)
[4133: Mon 26-03-30 02:00] (1.15125)
End of lookback period at 07:25:30
--> Friday 15:00 price is there multiple times, but Sunday 23:00 to Monday 5:00 prices are missing

The same applies to Z6+.
Z7 on the other hand is not affected.
Maybe it is a problem with the C++-based strategies?

I tested with MT4 bridge on a demo account if that matters.

Forex strategies normally use no time zones or "german time". Forex is traded 24 hours. If nothing else is set up, the weekend ends Sunday 23:00 UTC by default.