Setting the execution command in the on_cancel field will cause the loop to fail to exit the Dialog page

For example the following one

{
  "type": "minecraft:server_links",
  "title": {"text": "link ui"},
  "button_width": 200,
  "on_cancel": {
    "action": "run_command",
    "command": "tellraw @s {\"text\":\"close message\"}"
  }
}