The Auto Invest does not work instantly, it works based on a queuing system. The logic works upon FIFO (first in first out) method – the first strategies added into the queue (after creation or update) are first taken out to be fulfilled. If the number of active strategies on the platform is high, it might take more time until your funds are fully invested.
On average, after creation or editing, strategies start to work within 1 day, but it may also start working within minutes or hours. How fast your strategy will start working depends on its settings, how many active strategies are in the queue, similar strategies, loans available, funds available, priority in the queue (loyal investors have a priority, first goes Platinum, then Gold, then Silver), and other criteria.