Boolean Split does not delete input

Not sure if this is a Mac only issue.

Boolean Split does not delete the input cutting surfaces when option is selected.
Running Rhino for Mac
Version 7 (7.24.22308.15002, 2022-11-04)
MacBook Pro 16-inch, 2021
M1 Max with 64 GB memory

Attached is an example file.
Both sets of geometry have been boolean split with the delete input option selected.
However, the input remains.

File is attached.

Boolean Split Bug.3dm (4.6 MB)

Hi Jim - here is what I get -


Hi Pascal,
This is the result I get as well.
A and B are the inputs, and the split result is C and D.
I was expecting the Delete input=Y to leave just C and D.
Instead the cutting object remains.
Is this a bug? Or by design?