I submitted a ticket about this error on 19 Aug, herewith the link; https://www.joomlart.com/forums/d/24458-ja-megafilter-page-titles-map. It seems after the update of all extensions as well as the Joomla! version the titles appear not be working. Please have a look at the 'Accommodation' page of the site, upon click on any listing the page simply reloads and doesn't open the actual article. @saguaros, after the update everything you changed has been removed or overwritten.
I attached updated package for JA Megafilter component and the com_content plugin.
You can take a backup of your site first, then install 2 packages:
Once done, go to JA Megafilter component > Index the filter again.
I forgot the override file in template for this plugin.
Unzip the below attached file and overwrite this folder in template of your site:
/templates/ja_property/html/plg_jamegafilter_content/
Always remember to backup old files first.
Thanks for the support @saguaros, works perfectly now!