New issue view does not render single column tables properly

Issue Summary

When adding a single-column table using the old issue view, the table will display an extra column when converting it to the new issue view.

Steps to Reproduce

1 - Using the old issue view, add a board to a comment with a single column (Using the wiki style renderer):
 

2 - Convert it to the new issue view

Expected Results

The board should display the same way it does in the Old issue view:

Actual Results

The board displays an extra empty column:

Workaround

Use the new issue view to create the table.