Complex modifications to F1 & F2 don't work in 15.0.1 & 15.0.2

[CyborgSam]

Sequoia 15.0.1 on a MBP 16" M1 2021 and on a MBA 2023.

I have two complex modifications that stopped working with the 15.0.1 update. They map the defaults for F1 & F2 so the fn key is required for brightness down/up (see below). I know I can use System Settings to set ALL function keys to send their Fn code, but I want to use play & volume controls.

I use Keyboard Maestro to intercept F1 and perform "Hide Front Application" and F2 to "Minimize Front Window".

Here's the F1 complex mod:

{
    "description": "Change F1 to use fn for brightness down.",
    "manipulators": [
        {
            "from": {
                "key_code": "f1",
                "modifiers": { "mandatory": ["fn"] }
            },
            "to": [{ "key_code": "display_brightness_decrement" }],
            "type": "basic"
        }
    ]
}

TIA,
Sam