IfWinActive not work when drag app to another display

[songtm]

Hi, when I run the following script, open the firefox, it output "Exist"; but when drag the firefox to another display, it output "not Exist".

#SingleInstance, force


!b::
IfWinExist, ahk_class firefox
{
    MsgBox, Exist
}
Else
{
    MsgBox, not Exist
}
Return

and use the latest ahk version

[phil294]

dang, never noticed that. there's a filter for current display in win utils which can be removed, but there were several gotchas regarding that filter so it needs a closer look