I have an ASA5506W vith Ver 9.7.1 installed
Trying to get anyconnect up and running.
Anyconnect ver 4.3.04027-k9 made the ASA Reboot
ver 4.3.05017-k9 the same
I cant get any trafic through, But that's another problem.
I would recommend trying 4.4.00243.
If that doesn't work, you may need to wait for a newer patch to 4.4 (hopefully out soon).