Reply's not beeing sent in IE11

Reply's not beeing sent in IE11

I got a couple complaints from some admins.
When an admin reply's on a request and click on sent, the reply isn't sent and does not appear in the Requester Conversations.
In every case it is sent in IE11

we have build 9300.

Is this a known issue?
                New to ADManager Plus?

                  New to ADSelfService Plus?