The workaround (the APCF) does not seem to work any longer.
Can anyone confirm?
The last time around it was determined this was an issue with the ASA, not Guacamole. How do we know the issue hasn't changed/reccurred on the Cisco ASA platform?
As I don't have a Cisco ASA to test this out with, I probably can't be very much help in tracking down the issue, and I don't know that any of the other developers on the project have access to the ASA to do any testing. You'll have to provide more details to help track down the problem and suggest a solution.