Nelson,
On further testing, this is what I've found.
When the reports load, I can see they all stack up on top of each other, as before. Then, when I delete the top one, the rest are all minimized. If, after generating the report, I first grab the bar on the window and move it, then I can see the report below, and it may work as previously. Sometimes though, after moving the top window, and deleting it, the other windows are minimized and not on the screen.
If, however, I move the top window, and the one underneath, this seems to then keep all windows open.
Also, FYI, I'm using Chrome with pop-ups set to blocked, and the Method domain allowed. I also tried allowing all pop-ups and still get the same results.
cheers,
Rolf