SAMBA+ 4.15.10 has just been released by SerNet. Packages for various SUSE and Red Hat platforms as well as for Debian GNU/Linux, Ubuntu and AIX are available now.
These packages address several issues, the changes since Samba 4.15.9 are listed in the release notes here: https://www.samba.org/samba/history/samba-4.15.10.html