Example i3 layout that causes Slack to crash

i3-communication-layout.json

{
    // splitv split container with 2 children
    "border": "normal",
    "layout": "splitv",
    "percent": 0.4,
    "type": "con",
    "nodes": [
        {
            "border": "pixel",
            "current_border_width": 2,
            "name": "Messenger",
            "percent": 0.56,
            "swallows": [
               {
                  "class": "^Chromium$",
                  "instance": "^www\\.messenger\\.com$"
               }
            ],
            "type": "con"
        },
        {
            "border": "pixel",
            "current_border_width": 2,
            "name": "WhatsApp",
            "percent": 0.44,
            "swallows": [
               {
                  "class": "^Chromium$",
                  "instance": "^web\\.whatsapp\\.com$"
               }
            ],
            "type": "con"
        }
    ]
}

{
    // splitv split container with 2 children
    "border": "normal",
    "layout": "splitv",
    "percent": 0.4,
    "type": "con",
    "nodes": [
        {
            "border": "pixel",
            "current_border_width": 2,
            "name": "Slack",
            "percent": 0.56,
            "swallows": [
               {
                  "class": "^Slack$",
                  "tiling": true
               }
            ],
            "type": "con"
        },
        {
            "border": "pixel",
            "current_border_width": 2,
            "name": "Viber",
            "percent": 0.44,
            "swallows": [
               {
                  "class": "^ViberPC$"
               }
            ],
            "type": "con"
        }
    ]
}

{
    "border": "pixel",
    "current_border_width": 2,
    "name": "TeamSpeak 3",
    "percent": 0.2,
    "swallows": [
       {
          "class": "^TeamSpeak\\ 3$"
       }
    ],
    "type": "con"
}