Pie Order Delay Due to Order Type

I’ve noticed a bug when placing pie orders. . The issue occurs when one stock is taking longer to process then the others in the list, e.g. AIM listed orders. If the stock isn’t purchasd, it locks up the rest of the pie order; the ‘investing’ action stops, rather than move on to other stocks that could otherwise go through straight away. Pie orders seem to only want to invest in a particular order, rather than attempt to action all investments.