Cannot copy multiple rows of a table in Confluence editor without highlighting entire rows

Problem Summary

It is not possible to copy multiple rows of a table unless entire rows are highlighted, despite what the UI is showing.

Steps to reproduce

1. Create a page
2. Click "Insert > Markup" and add in the following sample content:

   ||head1||head2||head3||head4||
   |.|.|.|.|
   |highlight me|highlight me|highlight me|.|
   |highlight me|highlight me|highlight me|.|
   |.|.|.|.|
   

3. Use mouse to highlight the cells that say "highlight me". Make sure the background of the cells show up blue (indicating highlighted)
4. Copy (Ctrl + C / Command +C)
5. Paste results elsewhere in the editor (Ctrl + V / Command + V)

Expected behavior

A 3-column by 2-row table should be created by the paste

Actual behavior

Only the top row was actually copied, resulting in a 3-column by 1-row table from the paste.

Other notes

If you highlight to the end of each row then multiple rows will be copied and pasted as expected.