Steps to reproduce:

1. Open Windows Calculator.
2. Type 2
3. Type +
4. Type 3
5. Type = (or Enter)

Note that the new appmodule listens for the Enter key, but not the equals (=) key. However, both work to display the result. Speech reports the result when you press Enter, but braille provides no feedback regardless of what key you press.

Actual behavior:

The braille display continues to show "Display is 0".
There are two problems with this:

1. As you type (without using speech) you cannot verify what you just entered.
2. Once the result appears, you cannot read it unless you temporarily move the focus away from the display and back again.

Expected behavior:

The braille display shows each number, operator and result as you type.

System configuration

NVDA installed/portable/running from source:

Installed

NVDA version:

2020.4

Windows version:

Version 10.0.19042 Build 19042

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.

Yes, it worked in NVDA 2019.3.

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

Yes

Did you try to run the COM registry fixing tool in NVDA menu / tools?

Yes