There is a problem setting the window title.
I do controller.getWindow().title = "whatever"; in onRecordSelection and on firstShow but the title flickers quickly when it shows the first time and goes back to the normal form name.
Sample solution attached.
In it, click the button on the first form and a window will pop up with the form name instead of the title (the title is supposed to be the 'employeecode' field value from a record, so make sure you have data or change the code to a fixed string for the title).
So, when the window is brought up the first time, you can see in the console that the window title is set correctly but it displays the form name anyway
When you start moving from record to record then it is fixed but the first time the window is popped - it's not working.
Support case created SVY-3503
Cheers,
Maria