In Rider 2020.3, I find that editor tabs that have Alt+n keyboad shortcuts no longer prefix the tab's title with the number n. Instead of
0 Build, 1 Explorer, 2 Favorites, 3 Find, 5 Debug, 7 NuGet, 8 Unit Tests
Build, Explorer, Favorites, Find, Debug, NuGet, Unit Tests
Some other editor tabs that previously had no keyboard shortcuts now have them. Examples are Ctrl+Alt+2 for Errors in Solution and Cltr+Alt+3 for Database. That is most welcome. However, it appears that, as these new triple-key shortcuts would be awkward to show on the tab captions, for consistency all the existing shortcut numbers have been removed from the tab captions and instead there are mouse-over tool tips to show all the shortcuts.
If I am correct that this indeed a change by design, I for one would like to see the return of the shortcut numbers on the editor tab captions, at least where there is a two-key shortcut such as Alt+1 for Explorer, for which the caption would then be "1 Explorer", as it used to be.
If there's a preference I can change to get the shortcut numbers back in the editor tab captions, I would like to know about it.