Deploy sign missing for users

One of my user (admin) tell me that if he goes to the downloads sections (module=CoreHome&action=index&idSite=1&period=day&date=yesterday#?idSite=1&period=day&date=yesterday&category=General_Actions&subcategory=General_Downloads) he can’t deploy each line to see the details (using the plus sign).
He was able before, and I can as superadmin. Even if I put him superadmin he can’t
Strange bug