jquery file uploader was working fine with grails version 2.4.5 but when we switched to grails 5.1.2 then uploader does not picks file less than 100kb

Question

Uploader is reading any file larger than 100kb but files having size lower than 100kb multipartFile object is null

The command object is

class UploadInfoListCommand implements Validateable{   MultipartFile infoMasterFile   String localeFileileExtension

  static constraints = {
    infoMasterFile  validator: { val, obj ->
      if ( val == null ) {
        return false
      }
      if ( val.empty ) {
        return false
      }

      ['xlsx'].any { extension -> // <1>
        val.originalFilename?.toLowerCase()?.endsWith(extension)
      }
    }   }

and the GSP code is

<div class="input-group">
                <input type="text" class="form-control" readonly placeholder="${message(code:'info.uploadModal.language.placeholder.file', default:'Please select a document')}" id="bulkUploadDocumentInfo"/>
                <label class="input-group-addon btn btn-default" for="bulkUploadDocument">
                  <input type="file" id="bulkUploadDocument" name="infoMasterFile" style="display:none;" data-validate="maxFileSizeMB(5)" onchange="$('#bulkUploadDocumentInfo').val(this.files[0].name);">
                  <g:message code="info.uploadModal.language.label.searchFile" default="Add New File" />
               </label>
</div>