Ah yes thanks. I did see your comment and I indeed also slightly suspected the python bindings but haven’t dugged that deep into the code yet.
I was trying to find the github ticket for this particular issue and determine if this constitutes a tutorial/documentation change or a fix in the bindings. But I believe I’ve just found it indeed so I’ll continue the discussion there: Strange behaviour of cv2.add operation · Issue #25165 · opencv/opencv · GitHub