Chat heads in Facebook Mobile app has disappeared

[AC Question]

There was an update to Facebook mobile and now the chat heads icon has disappeared so I cannot see which of my friends are on active chat? How can I correct this?

 

[Sherah1]

If it helps I lost it from my S5 phone, after an update last week too. I've uninstalled/reinstalled but no difference. I've reported to FB but no response. Have just been googling for advice and came across your post. Can anyone help please? I'd like my Chat back. I use it all the time as some of my friends don't use Messenger. Thanks.