Here's how you can debug simple-keyboard locally:
https://github.com/hodgef/react-simple-keyboard?tab=readme-ov-file#to-run-demo-on-your-own-computer
In there you can add breakpoints and check out the Call Stack (to see what called what).
Optional: If you want to fix a React-only issue you can run this command to use a local simple-keyboard in your react-simple-keyboard installation:
npm install C:\path-to-simple-keyboard