Can't add newline to end of SVG 1.2 flowed text (1.1-dev)

Steps to reproduce:

• Open Inkscape
• Double click on the Text tool icon (opens Text tool preferences)
• Disable Use SVG2 auto-flowed text (last option before Font directories)
• Switch to the text tool
• Click and drag to create a box (creates some SVG1.2 flowed text)
• Type some text
• Try to add a newline by hitting enter

What happened?

• Newline not added if you're at the end of the last line

What should have happened?

• Newline should be added, allowed us to add more text without any workarounds.

Version Info:

• Inkscape 1.1-dev (cc619caa, 2020-09-10) Linux Mint 20
• Bisection points to commit e0dd6e42

Author: Marc Jeanmougin <marcjeanmougin@free.fr>
Date:   Wed Apr 29 13:13:52 2020 +0000

    Ignore flowPara without children to be consistent with rendering in previous Inkscape versions
    
    Fixes part of https://gitlab.com/inkscape/inkscape/-/issues/1349

No duplicates under label inbox~15959937, but only looked at open issues in Inbox/Inkscape since April