Some keys are not registered in a layer with modifier

[beaverkiria]

Hey there!

I'm trying to use homerow mods via space layer and I noticed that some keys are not registered with layer enabled. For example, no events are registered when I press spacebar + a to enable left_control and then press h key, although it works for every other key.

Here is my short test karabiner configuration that reproduces the problem.

{
  "profiles": [
    {
      "name": "--dry-run",
      "complex_modifications": {
        "rules": [
          {
            "description": "Layer - space_layer",
            "manipulators": [
              {
                "type": "basic",
                "from": {
                  "key_code": "spacebar",
                  "modifiers": {
                    "optional": [
                      "any"
                    ]
                  }
                },
                "to": [
                  {
                    "set_variable": {
                      "name": "space_layer",
                      "value": 1
                    }
                  }
                ],
                "to_after_key_up": [
                  {
                    "set_variable": {
                      "name": "space_layer",
                      "value": 0
                    }
                  }
                ],
                "to_if_alone": [
                  {
                    "key_code": "spacebar"
                  }
                ]
              },
              {
                "type": "basic",
                "from": {
                  "key_code": "a",
                  "modifiers": {
                    "optional": [
                      "any"
                    ]
                  }
                },
                "to": [
                  {
                    "key_code": "left_control"
                  }
                ],
                "conditions": [
                  {
                    "type": "variable_if",
                    "name": "space_layer",
                    "value": 1
                  }
                ]
              }
            ]
          }
        ],
        "parameters": {
          "basic.to_if_alone_timeout_milliseconds": 1000,
          "basic.to_if_held_down_threshold_milliseconds": 500,
          "basic.to_delayed_action_delay_milliseconds": 500,
          "basic.simultaneous_threshold_milliseconds": 50,
          "mouse_motion_to_scroll.speed": 100
        }
      }
    }
  ]
}