Our field setup:
We have a group filed that is marked as cloneable with a few sub-fields inside the group.
The first sub-field which is constant and shows all the time is а select field with 4 options. Based on the selection we show/hide another post select field ( there are 4 and change based on selected value ).
The bug:
When the initial group is shown everything works as expected, but after you clone it the post field comes with one post automatically selected. If you change the selection in the select field every different field that conditionally shows, comes with a pre-selected post. Even if you leave it as is, the non-selected post fields write in the database in the background.
Here is a short video displaying the behavior : https://imgur.com/a/pIzUD9E
If you need any additional information, let us know