[SOLVED]Dinamic search strange behavior

Hi all,
I got a standard Dinamic Search button on grid but when I add a field it comes twice… (???)
Really strange. I don’t know what to check becouse normally it works as expected.
I did a release upgrade without fresh installing.

Please have a look to video here : https://www.youtube.com/watch?v=awRNZ48dIAI

I have the same behavior today, after upgrading to 8.00.0031

This problem has been fixed in release 8.0.032