Never run VistaONE and VistaX on the same MT5 account simultaneously. If you want both, use separate broker accounts and separate MT5 terminals. Mixing EAs on one account causes unpredictable behavior.
Longer cycles mean drawdown can accumulate over days or weeks. If your lot size is too large relative to your balance, you may not have enough margin to survive a full cycle. Size conservatively and give the system room.