@wt10001 very strange. You said the jogwheels work as expected with Rekordbox? This makes me think it has something to do with connecting via Bluetooth. Do you have a USB-C iPad or Lightning connector iPad? Have you tried connecting the FLX4 to the iPad via USB cable instead of Bluetooth?
Also I noticed that there’s a firmware update on the Pioneer Website for the FLX4. Are you running the latest firmware?