Any updates on this one? I am still seeing the main.index_merge_innodb failure in https://buildd.debian.org/status/fetch.php?pkg=mariadb&arch=ppc64el&ver=1%3A10.11.2-2%7Eexp1&stamp=1678728871&raw=0 and rebuild https://buildd.debian.org/status/fetch.php?pkg=mariadb&arch=ppc64el&ver=1%3A10.11.2-2%7Eexp1&stamp=1679174850&raw=0.
Logs show: Kernel: Linux 5.10.0-21-powerpc64le #1 SMP Debian 5.10.162-1 (2023-01-21) ppc64el (ppc64le)