Hi there,
This is something that should be addressed, as we did not have such an issue on our installation we need to find what was the issue on your environment.
Would you please kindly try to recreate the page you were working on, but this time save things step by step to see which step is the problem cause.
Ideally, do it when all 3rd party plugins are deactivated to rule out any possible 3rd party plugin conflict.
Also, try to do it with the parent theme enabled and do not use the child theme to be on the safe side.
Get back to us with the details of your investigation to be able to dig deep regarding this.
Thank you for your patience and cooperation.