After last Cumulative Update for Windows 11 Insider Preview (10.0.22623.885) (KB5020054) which seems to have been focused on Taskbar & System Tray bugs.
The taskbar is not hiding automatically anymore as it should.
Meaning, end-user will need to click on any place in the desktop main window to wake the hiding taskbar function and if you click on taskbar itself for any reason then taskbar will remain stuck again until you click again on desktop.
By opening webpage, the taskbar will hide automatically has it should, but once webpage minimized, the taskbar will reappear on its own and remain visible get until user click anywhere again on desktop then it will hide.
See video below
(On video, when you see taskbar hiding after a while being displayed, it is when I do click on desktop to hide it. Otherwise, it won't hide automatically as it should)
https://youtu.be/AiAenfLs4u4