Key ups being sent if "set_notification_message" is enabled

[ibrahimqasim]

I have the following rule set up:

{
    "description": "Create Hyper key",
    "manipulators": [
        {
            "description": "caps_lock -> command + option + control + left_shift, hyper = true, notification",
            "type": "basic",
            "from": {
                "key_code": "caps_lock",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "left_shift",
                    "modifiers": ["left_command", "left_option", "left_control"]
                },
                {
                    "set_variable": { "name": "hyper", "value": true }
                },
                {
                    "set_notification_message": {
                        "id": "hyper-layer-notification",
                        "text": "Hyper layer:\na: Application layer\nb: Browser layer"
                    }
                }
            ],
            "to_after_key_up": [
                { "set_variable": { "name": "hyper", "value": false } },
                {
                    "set_notification_message": {
                        "id": "hyper-layer-notification",
                        "text": ""
                    }
                }
            ]
        }
    ]
}

And in the Karabiner event viewer, I'm seeing:

down left_command
down left_control
down left_option
down left_shift
up left_shift
up left_control
up left_option
up left_command

This is even when the caps_lock is held.

If I remove the set_notification_message, then only left_shift goes to the up state. If I remove set_variable, then it behaves as expected.

I am trying to achieve the following behaviour:

• When caps_lock is pressed or held, map it to cmd + opt + ctrl + shift
• Set a hyper variable, which is needed to manage other rules
• Set a notification to show the other layer options
• Disabled the notification and hyper variable if caps_lock is released