GW Messenger crashing server on every conversation/reply

When opening a chat, typing a message then closing the window the server falls over....then it restarts the service and everyone logs in.

Happens everytime there is a new chat if you close that window, or the person replying closes the window.

Had this open with support now since verion 2018 was released, had multiple upgrades now on version groupwise_messenger_full_18.0.2_7769.tar.gz, still the same issue.

Anyone else have this or just me, support seem to be struggling