There have been many issues reported with Mission Control and Spaces on macOS 27 Golden Gate, especially regarding the way Full Screen apps and app switching are handled. Some have been resolved by identifying and removing incompatible 3rd party extensions, others are bona fide bugs. The minor point update, macOS 27.0.1, did not appear to address the more significant issues.
Bugs should be reported to Apple here:
Feedback - macOS - Apple
“We” are users like you and have no information about when or if Apple will address any issues/bugs. Apple employees are generally precluded from even reading these forums, with the exception of moderators who only monitor for compliance with the T&C.
Historically, fixes for minor issues at release take a full point update or two to be addressed (x.1, not x.x.1 like the recent 27.0.1, those are typically security patches). But some issues take longer, and some never get addressed at all (either Apple changed a behavior, or the issue is system-specific and Apple cannot replicate it).
Reporting issues like this to Apple is the only way to get them fixed. They do prioritize bugs based on frequency of reports, so the more people who report it, the faster it will be addressed.
Personally, Mission Control is working fine for my use cases on my 16" M4 Pro MBP running 27.0.1. I have many Spaces and open windows, but I don't use full screen apps and I don't have my apps grouped, both of which are associated with reported issues.
