I have unlocked the Extravagant Pride Fan item from a VRC+ Hype Train that I attended from the start to the end. The VRC+ page still states incorrectly I haven't unlocked the item, but I can spawn the item. (Video #1) This also occurred at the time of unpacking the item bundle.

Alternatively, the page displays the correct information of me having previously unlocked the item for a few frames, before updating status to "not acquired" again, as seen in video #2.