Hello! If you want to get progress on this one, please champion it upstream at https://jira.mariadb.org/browse/MDEV-17662 in a well argumented and detailed way.
In Debian we don't want to diverge from upstream on this one, since it would add the maintenance burden. Better get if fixed globally upstream. If the bug report channel does not get you progress, try the mailing list or the Zulip or IRC chats.