Hi Everyone - it may or may have not had something to do with the PHP-FPM change, however, this solution fixed the issue:
https://docu.ilias.de/ilias.php?ref_id=1875&cmdClass=ilobjforumgui&pos_pk=11647&thr_pk=3792&viewmode=2&cmd=markPostRead&cmdNode=mh:5i&baseClass=ilRepositoryGUI#11647
https://docu.ilias.de/ilias.php?ref_id=1875&cmdClass=ilobjforumgui&pos_pk=11647&thr_pk=3792&viewmode=2&cmd=markPostRead&cmdNode=mh:5i&baseClass=ilRepositoryGUI#11647