diff --git a/bika/lims/browser/bika_listing.py b/bika/lims/browser/bika_listing.py
index 0eb92e9aae..514061bd5c 100644
--- a/bika/lims/browser/bika_listing.py
+++ b/bika/lims/browser/bika_listing.py
@@ -5,50 +5,34 @@
 
 """ Display lists of items in tables.
 """
-import json
-import re
-import urllib
 import copy
-from operator import itemgetter
+import json
+import traceback
+from AccessControl import getSecurityManager
+from Acquisition import aq_inner
 
-import App
-import pkg_resources
 import plone
-import transaction
-from AccessControl import getSecurityManager
-from Acquisition import aq_parent, aq_inner
 from DateTime import DateTime
-from OFS.interfaces import IOrderedContainer
 from Products.AdvancedQuery import And, Or, MatchRegexp, Between, Generic, Eq
-from Products.Archetypes.config import REFERENCE_CATALOG
-from Products.CMFCore.WorkflowCore import WorkflowException
 from Products.CMFCore.utils import getToolByName
-from Products.CMFPlone import PloneMessageFactory
-from Products.CMFPlone.utils import pretty_title_or_id, isExpired, safe_unicode
 from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile
 from bika.lims import PMF
 from bika.lims import bikaMessageFactory as _
 from bika.lims import logger
 from bika.lims.browser import BrowserView
+from bika.lims.browser.bika_listing_filter_bar import BikaListingFilterBar
 from bika.lims.interfaces import IFieldIcons
+from bika.lims.utils import getFromString
 from bika.lims.utils import isActive, getHiddenAttributesForClass
-from bika.lims.utils import t, format_supsub
+from bika.lims.utils import t
 from bika.lims.utils import to_utf8
-from bika.lims.utils import getFromString
 from bika.lims.workflow import doActionFor
 from bika.lims.workflow import skip
 from plone.app.content.browser import tableview
-from plone.app.content.browser.foldercontents import FolderContentsView, FolderContentsTable
-from plone.app.content.browser.interfaces import IFolderContentsView
 from plone.i18n.normalizer.interfaces import IIDNormalizer
 from zope.component import getAdapters
 from zope.component import getUtility
 from zope.component._api import getMultiAdapter
-from zope.i18nmessageid import MessageFactory
-from zope.interface import Interface
-from zope.interface import implements
-from bika.lims.browser.bika_listing_filter_bar import BikaListingFilterBar
-import types
 
 try:
     from plone.batching import Batch
@@ -787,8 +771,19 @@ def __call__(self):
         self.request.response.setCookie(
             'bika_listing_filter_bar', None,  path='/', max_age=0)
         # Saving the filter bar values
-        cookie_filter_bar = json.loads(cookie_filter_bar) if\
-            cookie_filter_bar else ''
+        if cookie_filter_bar is not None and cookie_filter_bar != '':
+            try:
+                cookie_filter_bar = json.loads(cookie_filter_bar)
+            except ValueError:
+                err_msg = traceback.format_exc() + '\n'
+                logger.error(
+                    err_msg +
+                    "Error decoding JSON object 'bika_listing_filter_bar' "
+                    "with value {} in {}."
+                    .format(cookie_filter_bar, self.context))
+                cookie_filter_bar = []
+        else:
+            cookie_filter_bar = []
         # Creating a dict from cookie data
         cookie_data = {}
         for k, v in cookie_filter_bar: