Error on form, field not empty when reload the page

I made the following code, it is the controller of the form I'm working on.

The problem is when I use bindingResult.haserrors and then I return the view, an error is well displaying, the field seems to be empty but really no I have to delete a character in the field to have a form with all fields empty (the character deleted is not existing, the field stay empty)

It's complicated to explain so don't hesitate to ask me some questions

@RequestMapping(method = RequestMethod.GET)
public String display(Model uiModel) {
    uiModel.addAttribute(WebConstants.LINK_SEARCH_FORM, new LinkSearchForm());
    return ViewConstants.LINK_SEARCH_VIEW;
}

/**
 *
 * @param link
 * @param bindingResult
 * @param uiModel
 * @return
 */
@RequestMapping(method = RequestMethod.POST)
public String findLinksByCriteria(@Valid LinkSearchForm link, BindingResult bindingResult, Model uiModel) {
    if (isCriteriaEmpty(link)) {
        uiModel.addAttribute("criteriaEmptyWarning", "error_search_criteria_empty");
        return ViewConstants.LINK_SEARCH_VIEW;
    }
    if (bindingResult.hasErrors()) {
        return ViewConstants.LINK_SEARCH_VIEW;
    }
    List<ILink> linkList;
    linkList = identityService.searchLinks(link.getSite(), link.getLinkType(), link.getInstallDate(), link.getEndDate());
    if (linkList.size() == 0) {
        uiModel.addAttribute(WebConstants.NO_RESULT, true);
    }
    uiModel.addAttribute(WebConstants.LINK_LIST, linkList);
    return ViewConstants.LINK_SEARCH_VIEW;
}