Hi, I have activated the default WordPress theme
The same shows the short description is the default!
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I used another product page
I tried to delete the description written in the short description (I made the short description empty)
The final result
If the product has a short description, the regulatory data uses the short description and makes it the default description and leaves the main description
Please see the picture in the link
https://imgur.com/mYnWw8m
Here is the test result after deleting the short description
https://bit.ly/3OoXb9i
What is the solution from your point of view so that the main description is always the default description