Comment text remains in text box after submitting it (Comment and close)

Description

Comment box remains the same text after submitting comment via Comment and Close

Steps to reproduce

1. Create a comment
2. Click on Comment and Close

Expected behaviour

1. Issue/MR is closed and comment is posted
2. Comment box is empty

Observed behaviour

1. Issue/MR is closed and comment is posted
2. Comment box still shows the posted comment