Weird mouse selection behavior under Section macro

Problem description

There will be weird mouse selection behavior under Section macros, if you put, text, table and then text. It won't be selected all, instead only half of it, despite you select with mouse correctly. It's not reproducible using keyboard.

Steps to reproduce:

1. Create an empty page
2. Insert a Section macro
3. Inside the section macro, enter some text, then a table, and some text after the table.
4. Try to select the two text sections including the table with the mouse.