How to remove the extra spacing below the footer

There is always extra space below the footer. This is a terrible layout problem in website development.

For example, I set both the site master header & footer to 100px height. And a single container with a calculated height (100vh - 100px). They are filled with a total of 100vh.

However, there is always some extra space that comes out of nowhere.

Any suggestions that can help?
If this problem cannot be solved, I have no choice but to abandon Editor X.

Thanks a lot!

@code-francischui hello
We are sorry that you experiencing this.
I’ve tried to recreate a similar page on my test site with the same values and was not able to recreate the spacing problem, you are referring to.
As per further check, I’ve tried to find out what could cause this issue, and for example, it could be some transparent element.
You can use the layers panel, to double-check if there is no something like this.
If you won’t be able to find the issue reason with layers, I can suggest you contact us via the Customer Care channel , so Editor X experts will be able to take a closer look at the site you are creating to get a better understanding of this situation.