I do have "trade timeout" and "no connection" errors in MT4 logs. But saying that the orders are still opened in MT4. So, I have 5 orders that Zorro doesn't aware of.

Do you mean that these errors are not related to Global Prime itself but a particular MT4 server? Are there any recommendations what to do in this case?

I'm using AWS t2.micro (1 cpu, 1gb ram) for running Z12. CPU is always 99% and it's super slow. I wonder if it is normal because manual says that it should be fine. But obviously, it's not enough resources...