BiDi broke in Windows 11

After years of no-problem Arabic in both Windows 10 and 11, Arabic text is now being displayed left-to-right in command prompt, Windows PowerShell and PowerShell 7.6.2 (I've removed Windows Terminal to simplify things).
In PowerShell ISE, in Konsole (windows .exe build) and all apps (Notepad, Office, Notepad ++, etc.) Arabic is displayed correctly right-to-left.  In the Windows shells the letters are shaped and joined correctly but display left to right.

. If I copy Arabic text from one of the misbehaving shells and paste it into a browser, Notepad, Konsole, etc. it displays correctly. I've tried changing fonts, changing code pages, checking registry entries and even an in-place reinstall of Windows, all to no avail.
Anybody have any ideas?