TYPO3 Core

Steps to reproduce:

In the new EM go to "Local Extension List". In my case, this displays (for example) 72 extensions

Now type 'fe' into the search box. This narrows the search to (for example) 15 extensions

Now add the letter 'e' to the search. This narrows the search to 2 extensions (feedit, feeditadvanced in my case)

Now press backspace in the search box (yielding 'fe') and you are back to 15 extensions. This is as expected and OK

Now press backspace twice in the search box (which clears the box) - the number of search results stays at 15 and is not jumping back to 72

If you press ENTER in the empty box, the 72 results are returned.

I thought this might be an ExtJS problem, but it is not (I found other examples where it works as expected).

(issue imported from #M17246)