Experiment automatically starts two times

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OS (Win11)
PsychoPy version (v2024.1.5)
Standard Standalone? (y)
What are you trying to achieve?:
I am trying to run my experiment, which runs quite well, however, after the first stimulus presentation, a new pop-up window starts initiating a new experiment to start again, even though I have already a running experiment.

Here is the output:

I have the same issue. On other times, PsychoPy opens multiple (3-6) instances of the experiment at the same time, just after a normal double click on Windows 11.
Did you manage to solve it?
OS (Win11)
PsychoPy version (v2024.2.1post4)
Standard Standalone? (y)

I’m having the same issue, but it seems to be only happening when I press ‘enter’ after filling out the information in the dialog box. If instead of pressing the ‘enter’ key I press the ‘OK’ button in the dialog box, it only starts once.

I think that what you are experiencing is key presses being sent back to the PsychoPy softrware itself as well as being received by the experiment. I have encountered this myself, but I haven’t been able to replicate it recently. Are you using two screens? If so, see whether it makes a difference if you drag PsychoPy to the other screen before running the experiment. What version are you using?