Steps to reproduce:

Open the nvda addons store.
now in the guides:
Updateable add-ons
or
Available add-ons
choose an addon from the list press space choose the option:
install
Now notice that the status of the addon has changed to:
Downloaded, pending install
switch to another tab for example:
installed add-ons
Now return to the tab where you downloaded the addon, in my case:
Available add-ons

Actual behavior:

note that the status of the addon has changed to:
Available

Expected behavior:

addon status must be still
Downloaded, pending install
this is because the addon has not yet been installed and has already been downloaded.

NVDA logs, crash dumps and other attachments:

System configuration

NVDA installed/portable/running from source:

portable

NVDA version:

nvda.exe, NVDA alpha-28355,02199b76

Windows version:

19045.2965

Name and version of other software in use when reproducing the issue:

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

no

If NVDA add-ons are disabled, is your problem still occurring?

yes

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?

yes