Steps to reproduce:

• go to Wikipedia's World War I page
• press ctrl+A to select all
• press ctrl+C to copy
• Alt+Tab to another application

Actual behavior:

NVDA freezes during a lot of time (maybe 30 seconds)

Expected behavior:

Text should be copied without NVDA freezing.

Note

Issue most likely due to the merge of PR #9843.
A solution could be to report the copied text only if its length is less than a specific value, and to report the number of copied characters else. This is the strategy used by the selection reporting.

System configuration

NVDA installed/portable/running from source:

Temporary copy (installer) and portable version.

NVDA version:

Today's alpha:
Version : alpha-21371,376edfcf

Windows version:

Windows 10 1809 (64-bit) build 17763.1518

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

Chrome - Version 85.0.4183.121 (Build officiel) (64 bits)

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

Not tested.

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

NVDA 2020.3 is OK.

If addons are disabled, is your problem still occuring?

Yes

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

No