Thank you for your screenshot, userinfo18.

We're looking into an issue where the QTY ON PO column changes to zero on the Product and Service list after using the item in an Invoice or making a quantity adjustment. Our engineers are investigating, and we are waiting for an update.

I recommend reaching out to our QBO Support to have your account added to the list of affected users. This will ensure that you receive updates directly from our engineers. You can give them this ticket number so they can easily find the log: INV-89151.

If you have other concerns, please don't hesitate to go back to this thread. Take care and have a good one!