The new tick size validation fails if a previous createOrder request used a larger tick size.

[Stars22]

If an order is created using client.createOrder with a tick size of 0.01, and the tick size subsequently changes to 0.001, attempts to create a new order with a valid price (e.g., 0.035) fail. This occurs because the system retrieves the cached value from the this.tickSizes object instead of fetching the updated tick size.