How to let vim immediate update the screen when I type ESC (in TUI mode)?

Hi,

For example, starting with normal model, then I type :, then type ESC,
it will take some time (maybe a sec) for the ":" at the bottom of the
screen to disappear (this is the case in TUI not GUI mode).

How to let vim immediate update the screen when I type ESC in TUI mode?

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Regards,
Peng

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