Dialog doesn't execute say command and can't suggest command

I don't know why, but when I created Dialogs that execute say command to try (I don't know if another commands doesn't works too), they didn't been executed on clicking the button, but with another commands like trigger or give or damage works. And any thing what I put in suggest command, doesn’t put in my chat, it’s not suggested…

Command to reproduce the bugs (in a Command Block) :

dialog shop @p { "type": "minecraft:multi_action", "title": { "text": "Test", "bold": true }, "body": { "type": "minecraft:plain_message", "contents": "When you cancel, it execute : /say cancel", "width": 150 }, "on_cancel": { "action": "run_command", "command": "/say cancel" }, "columns": 2, "actions": [ { "label": { "text": "Run "say" command", "color": "red" }, "tooltip": { "text": "Doesn't works", "color": "red" }, "width": 150, "on_click": { "action": "run_command", "command": "/say test" } }, { "label": { "text": "Suggest "say" Command", "color": "red" }, "tooltip": { "text": "Doesn't works", "color": "red" }, "width": 150, "on_click": { "action": "suggest_command", "command": "/say Test 2" } }, { "label": { "text": "Open URL", "color": "green" }, "tooltip": { "text": "Works", "color": "green" }, "width": 85, "on_click": { "action": "open_url", "url": "https://it-works.test" } }, { "label": { "text": "Suggest "Test" text", "color": "red" }, "tooltip": { "text": "Doesn't works", "color": "red" }, "width": 125, "on_click": { "action": "suggest_command", "command": "Test" } }, { "label": { "text": "Run "tellraw" command", "color": "green" }, "tooltip": { "text": "Works", "color": "green" }, "width": 150, "on_click": { "action": "run_command", "command": "tellraw @a {text:"Test",bold:true,color:dark_red,underlined:true,italic:true}" } }, { "label": { "text": "Suggest "tellraw" command", "color": "red" }, "tooltip": { "text": "Doesn't works", "color": "red" }, "on_click": { "action": "suggest_command", "command": "tellraw @a {text:"Test",bold:true,color:dark_red,underlined:true,italic:true}" } }, { "label": { "text": "Run "trigger" command", "color": "green" }, "tooltip": { "text": "Works", "color": "green" }, "on_click": { "action": "run_command", "command": "/trigger test set 10" } }, { "label": { "text": "Suggest "trigger" command", "color": "red" }, "tooltip": { "text": "Doesn't works", "color": "red" }, "width": 150, "on_click": { "action": "suggest_command", "command": "/trigger test set 10" } } ] }