The screen flashes when the experiment starts

The computer system is Windows 10 Version 22H2; the psychopy version is V2023.2.2.
The experiment can run normally, but when the experiment is started, the first mouse click does not respond. The screen flashes once when the mouse is clicked for the first time, and then the mouse click responds.

Most experiments start with some instructions. Your first routine seems to have a slider but no mouse component.

Thank you for taking the time to answer. But with the slider component, there is no need to add a mouse component. I also used slider in another experiment, and it ran normally without adding a mouse, with no exceptions.

Try adding a routine before the loop with a blank text component that lasts for 1 second.

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