Photoshop adding corner radius to shapes without my permission

[M_G6]

(Pshop 22.4.1, Mac Catalina)

Today Photoshop has decided, against my wishes, that I want all shapes drawn with the rectangle shape tool to have a 10 px radius on all corners. What sort of Satanic software is Adobe selling? And how do I tell Photoshop I want all future rectangles drawn with the rectangle shape tool to default back to a 0 corner radius, and that the decision to add a corner radius is for reserved for me, and not Photoshop?

[Barbara Ash]

Strangely, the round corners seem to be the default. You can change to square corners by setting zero in the Options bar.

[Barbara Ash]

Once you change to zero, that setting should stick, even if you close and relaunch Photoshop.