During an "early look" at the second Halo Infinite multiplayer preview today, 343's community director, Brian Jarrard, made a small "breaking news" announcement about some possible schedule changes to the next flight.
It seems the team has discovered some "late breaking issues" just before sending the build live:
"Today I want to be very transparent that we are excited for this next preview - you know the selection emails have already gone out. Our hope is that this flight is gonna kick-off very, very soon, officially the build was supposed to go out tomorrow - this may or may not happen.
We are potentially going to look at a time shift here, we're not quite sure - when it's ready we'll be ready, we want to be very transparent with you though, we're very appreciative of all the Insider support we see out there but we might have a small shift in our schedule and if we do we should have more clarity on that at some point in the very near future. So we do ask you'll stay tuned to Halo Waypoint, stay tuned to Halo social on Twitter, in particular - we will provide those updates.
For now the teams are working very, very hard, we're still progressing but we're in a little bit of a holding pattern due to some late breaking issues we've found along the way in this release process, so there is a chance we might have a shift in schedule."
As noted, updates will be shared on Halo Waypoint and social channels when "the call" is made:
The next multiplayer preview is currently scheduled to take place during specific times between September 23 - 26, and September 30 - October 3.