Exactly how do you save the PDF?
Can you try Overprint preview?
but the previous version was not like that,
because the file is for offset printing
Can you please upload that PDF?
I cannot reproduce your result with the file.
So maybe reboot the computer? If that doesn't work, reset the preferences?
this file only text and rectangle with opacity 25%
Does copy/paste instead of place give the same result?
It can if copy & paste,but file from client
if I open it missing fonts & some effect change,
the only way i must place it
If I place your file linked, the transparency is there.
Could it be something with the file you are placing it in? Can you place it in another file?
Your pdf file works fine for me
I placed on top of a 100 yellow rectangle, does the same not happen for you? If you placed of top blue, you would not see a result.
Does it work when you go to View > Preview on CPU?
Ok thanks,its work