Using older versions of Outlook for Mac for personal email and calendar
We generally don't pre-announce the dates for updates. In general if you are on Insiders Fast, you will be the first to get recent updates, followed by Insiders Slow and then production (official release). However, there is a lead time between when a fix is made and when the update is released. If a fix doesn't make the cutoff, it would be in the following update. This means if you are NOT on an Insider release, and a fix just misses the cutoff for a production release, it could take a month for you to get the fix.
All that being said, if are on Insider Fast, you should update to the latest release that went out earlier this week and see if the fix is there.