I’ve got the same issue. It seems to be specific to active directory ldap (paged search).
If this problem has high impact on your activity (in my case some user couldn’t see their groupfolders anymore) a temporary solution is to switch to the old ldap library in apps/user_ldap/lib/LDAP.php
line 46
- if (version_compare(PHP_VERSION, '7.3', '<') === true) {
+ if (true || version_compare(PHP_VERSION, '7.3', '<') === true) {
But this bug can have a big impact. Hope it will be resolved soon, like in the next version 19.0.2