On OSX10.13 and previous and on Windows
App loads a local html file into a QWebEngineView.
Local page displays as expected.
There is a button to click defined with a FORM METHOD='POST' block
When the button is clicked, the loadProgress event fires
loadProgress reaches 100%
The loadFinished event fires when the secure form has loaded
The secure purchase form is loaded and displayed allowing user input
On OSX 10.14+
App loads a local html file into a QWebEngineView.
Local page displays as expected.
There is a button to click defined with a FORM METHOD='POST' block
When the button is clicked, the loadProgress event fires
loadProgress reaches 100%
The loadFinished event NEVER FIRES to indicate secure form has loaded
The secure purchase form is NOT DISPLAYED..JUST BLANK SCREEN
Manually loading the html file with any browseron both OSX10.13 and OSX10.14 works fine. Secure form is displayed when FORM METHOD='POST' button pressed for both OSes.
The above method has been working for 8 years. It has worked on QWebKit and QWebEngine until the release of OSX10.14.
What has changed to make QWebEngineView malfunction?
Does QWebEngineView not handle JS code when run on OSX10.14???