My feeling (totally unproven) is that in the drive to make Sonnet 3.7 more "agentic", they've lost some of its ability to actually just stick to what you asked it to do. It seems that it "wants" (I know, it's not sentient!) to be more in the driver's seat now.
Definitely can be very annoying if you do just want it to execute on a set of instructions.
Definitely can be very annoying if you do just want it to execute on a set of instructions.