TTIWAdvMessageDialog fails in firefox

TIWAdvMessageDialog fails with no sever response in Firefox Quantum ver 60,02 but works in both Chrome and MS Edge. IW version 14.2.8 Ultimate.  Does this in both SA and ISAPI builds.  The dialog displays, but errors out on both TIWAdvMessageDialog1ButtonClick and TIWAdvMessageDialog1AsyncButtonClick events.  The dialog does not close. 


I have not been able to reproduce this issue.
Can you please provide a ready to run sample project that demonstrates the issue so I can further investigate this? 
Sample projects can be emailed as a zip file to
Please make sure to not include any executable files in the attachment.

Thank you Bart.  Project sent to your email.

This was replied to via email.