Hello, thanks for your quick response.
I also tried it on a fresh WordPress installation and the error still occurs.
Afterwards I activated the script debug and you can find the screenshot of the error logs under the following link:
https://cnmodelmanagement.com/assets/error-message.png
In addition, I have recorded the steps to reproduce the error in a screencapture:
https://cnmodelmanagement.com/assets/screen-recording.webm
Here you can see the difference if you wait for the tooltip or quickly click on the save button.
I hope this helps.