Working with tables

Hello, I suffer some issues while implementing tables into my projects. Here is a list:

1) The system slows down: place the table in the desired position is difficult because the movement with the mouse is not fluent as per other elements

2) Table and Cell size are not precise. Something strange is with the functions to distribute rows and columns automatically. I have the impression that the distributing feature has problems especially if the table contains merged cells.

Could you open a ticket to investigate and ameliorate that?

Thanks

Andrea