This is likely not the expected behavior when the overlay is active, although it is neat to see my listView components update with clicks in the background through it.
In a bit of testing this, it does not appear to occur if the option to "close when clicking outside" the modal is active (as shown by @MiguelOrtiz) which should cause it to behave like a "real" modal in that you can't make clicks on the background components, but it closes.
If you want to force the user to interact only with the modal, I suggest making it Full Screen so that there is no visibility to the other objects without first confirming or canceling that deletion.