Yes as mentioned in the title, the "+" shortcut does not seem to work in an empty tab.
The filter shortcut "*" works, the ">" command shortcut as well and so does thje "'" DO find shortcut.
So I would expect the Evrything search to be accessible in an empty tab as well?!
I think I read about this fix in the change log and was happy to find this change! o)
Now, I somehow ended up in this thread (again) and while I'm here, let me say..
After praising you and the fix I actually tried and it still does not work for me..
In the video you see me doing trying the "+" everything global search and searching for "exe" in..
a locked tab in a root folder, in which I was able to enter "+e" and then it already switched to the everything result, even though I did not enter "Enter"
a regular tab, in which everything worked as expected