Hi. With a medium number of articles (about 20k) the filter stuck for very long time on save/indexing and at the end it show a blank page. This on back-end.
On front-end the filter page remain stucked on loading.
Filter name is Filtro articoli per paese (it-IT)
Page name is cerca-articoli-per-paese
Please ask me before install any extensions (e.g. Akeeba Backup).