Build 19042, concat don't works in dropdown

There might be something else like WHERE clause that relies on session variables that breaks your dropdown.
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There is no where clause, I tryed to reset the page, if I select only one field it works, but with concat not works, the result is a dropdown with correct number of lines, but the character is white and not black, only the "please select.." is in black. <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=reply&id=73113&image=1&table=forumreplies' class='bbc_emoticon' alt=':huh:' />

There is nothing in WHERE clause, I tryed to reset the page, and delete the **search.php. If I choose only one field it works, but with concat not works, the result is a dropdown with correct number of lines, but the character is white and not black, only the "please select.." is in black. <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=reply&id=73114&image=1&table=forumreplies' class='bbc_emoticon' alt=':huh:' /> The problem is only in 7.0 version, in SEARCH page, the ADD and EDIT page works fine. In the 6.2 version works everywhere!

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Without having access to generated application we can only guess what might be wrong.