I have to admit I don't use the sniper app regularly bit it JAS won me items in the past, bit the few times I've set a bid in the last few months it appears not to have placed a bid for me at all. Have i missed an update or does it no longer work due to an android update?

Not sure what you mean about Android update. It's not related to the service which does not have anything to do with Android.

You did not include the item number in question, so I can only guess what happened.
If you don't want to share it, please let me know what did you see in the status of your snipe at least.