colon brings up vscode command palette not vim command

[simohauml]

On my Mac OS, after press colon ':', vs code command palette pops up instead of vim command, and is status bar a string shows, workbench.action.showCommands. I think that indicates somewhere I set up colon as a shortcut to vscode command.
Slash works fine.
And it works fine on my Windows.

Where can I find the wrong settings and get vim colon work?

[simohauml]

There is a key mapping setting for VIM extension in my settings.json. Cann't remember where it is from. Remove it solves the problem.

{
    "before": [":"],
    "commands": [
        "workbench.action.showCommands"
    ]
},