Every time I hit Enter to send a chat message in Jabber, it takes 1-2 seconds for the message to send. When I receive a message, I hear the receipt sound, but the message doesn't show up until a few seconds later. I started using Jabber a few months ago and this problem has been happening for the past week or two, so it hasn't always been like this. Prior to a week or two ago, sending and receiving chats was instantaneous.
I am using Jabber 10.5.2 on Windows 8.1