Steps to reproduce:

1. Create text as follows in the notepad.

test




test 123 123


test 111




test   ooooooo




test one



test two





teeest


wauw







test




test 123 123


test 111




test   ooooooo




test one



test two





teeest


wauw






test




test 123 123


test 111




test   ooooooo




test one



test two





teeest


wauw

2. Go to the beginning of the text.
3. Press the NVDA + down arrow.

Actual behavior:

Voices crack in some places.

Expected behavior:

System configuration

NVDA installed/portable/running from source:

installed

NVDA version:

2019.3.1

Windows version:

windows 10 pro, 64 bit, 18363.778

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.

Tested with versions after 2019.3.1.
Sounds are cracking.

If addons are disabled, is your problem still occuring?

Yes

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

Yes