Steps to recreate:

1. Employer post a project
2. Freelancer bid
3. Employer awarded the project to freelancer
4. Employer dispute the project
5. Admin on the disputing screen, to send message to freelancer — type a message and click on send

Expected:
The message should be added to the thread after clicking send

Actual:
The message will only appear in the thread after you refresh the browswer.

https://imgur.com/GbCB6l1

Please also note that the color of the send button does not change when hovered or clicked.