When editing a page using the Visual Editor in the Old Version Edit UI, various features that used to work don't any more.

• @mention: Doesn't work at all. Typing "@abc" or whatever doesn't bring up the dropdown list of pages to link.
• / commands: Many commands are missing from the dropdown list.
• Autolinker
• Article Block
• Category Block
• Manuscript
• Secret Block
• World Block
• Bloodline
• Calendar
• Diplomacy Web
• Family Tree
• Map
• Content Tree
• Statblock
• Interactive Table
• Image
• Image Block
• Carousel
• Popup menu for selected text: The "Create Link" button is missing. When editing a page that already has a hyperlink created by "Create Link", the link is removed.

These problems also occur on the bug report page that I'm typing in right now. These problems are not seen:

• with the Euclid editor in Old Version Edit, or
• with the Visual Editor in the "new" editing UI.

I first noticed this problem on Feb. 19. Tested with Firefox and Edge on Windows 10, on two different computers. Clearing the browser cache did not help.

I have some screenshots to show these problems. I will post them if I can figure out how to embed them (/image isn't working).

I prefer the Old Version Edit UI over the new editing UI, for several reasons, so I hope that it will still be supported.

• Select a page in the normal editing UI.
• Make sure the Visual Editor is selected for this page.
• In the normal (new) editing UI, type in some editing commands, e.g. "something" or "/image".

Result: It works as expected. A dropdown list appears and the desired page or command can be selected.

• Switch to the old editing UI by clicking "Old Version Edit" on the dropdown menu at the top right.
• Type "something" .

Result: No dropdown list appears. Expected a dropdown list to appear.

• Type "/image".

Result: After pressing "/" a dropdown list appears, but it disappears by the end of typing "/image". Expected the dropdown list to display the "Image" command.