`gq` is inconsistent when reflowing multiple lines at once

Describe the bug
gq does not reflow properly when trying to reflow mulitple lines at once

To Reproduce
Steps to reproduce the behavior:

1. Paste in the following lines with linebreaks:

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum ante nibh, molestie et accumsan 
rhoncus, interdum vel urna. Nullam lacus ipsum, rhoncus
sagittis dapibus id, imperdiet eget ex. Nullam sagittis justo in nunc ultricies sodales. Proin id enim massa. Duis sagittis lacus erat, id molestie tellus
volutpat eu. Ut quis tincidunt justo,
in dictum ex. Aliquam 
in lectus at dui
aliquet auctor ac a lorem. Curabitur eget consectetur dolor. 

2. Select all lines (for example vip) and then gq.
3. Observe that the reflowing is very inconsistent.

Expected behavior
I expect it to look as the first after section in the image below, but rather it is very inconsistent in its
line widths.

Screenshots

The first before/after set is what I expect, the latter is the exact same words, but with some added line breaks.

Environment

• Extension (VsCodeVim) version: 1.20.2
• VSCode version: 1.56
• OS: (K)Ubuntu 20.04, Windows 10 Home

Additional context
Add any other context about the problem here.

Start by reproducing the issue in VSCodeVim with the supplied text, selecting all lines and running gq. Compare the result with the expected first “after” example in the linked screenshot. Done means reflowing the same words produces consistent line widths regardless of the original line breaks.