The usual Aliexpress seller shenanigan is to push out a placeholder fake tracking number first, to meet AE's deadlines. So this bypasses their internal deadline and mysteriously days later the tracking number suddenly changes.
Word of warning though, some disreputable Aliexpress shops have tried to scam me before by issuing said fake tracking number, and it subsequently says delivered (but obviously the item was not even sent out and nothing was received on my end). I had encountered shops giving a tracking number to a Siberian wilderness address LOL (definitely not where I stay at). So be wary and pay attention to the tracking, cause if the item is labelled as "delivered" and the case is closed, you might be on the losing end from some of these unscrupulous shops.
I've had that experience. It seemed to happen with shipping methods i hadn't heard of before like UBI or ones that are usually expensive like UPS.
I try to stick to familiar services now like AE Standard (try to use this as much as possible), Singapore post or special Line YW.
Haven't had any issues lately with scams like that but i have had stuff that tracks weird. Like it tracks until it leaves China than ali tracking disavows all knowledge with a message saying that the package is now with NZ Post and i should contact them for updates.
Its frustrating. If they could sort this sort of crap out Ali would become quite dominant. In NZ we pay prices that reflect multiple middle men on many items. If you can even find someone selling what you're looking for.
Parts for my ancient laptop for instance are available via the company that has the service contract for MSI at 3-7 times the price i can find stuff on Ali for.