Samsung has already equipped some of its devices with Android 12 and the associated One UI 4.0 interface. If you are one of the owners of such a device and at the same time use Google Notes to file your thoughts and other important things, then you may have already stumbled across the following bug.
Some users report that Google Keep randomly doubles numbers in numbered lists when adding new items or navigating through the list. This is certainly not a widespread bug, but Google seems to be working on a fix. If you are affected, check the Google forum from time to time and keep the app up to date.