BUG #16866: pg_basebackup Windows Server 2016

The following bug has been logged on the website:

Bug reference: 16866
Logged by: Ivan Salvato
Email address: ivan(dot)salvato(at)gmail(dot)com
PostgreSQL version: 12.0
Operating system: windows
Description:

Scenario
- vm Windows Server 2016
- PostgreSQL 12 (configurated wal_level = archive; archive_mode = on;
archive_command = 'copy "%p" "W:\\POSTGRES\\pg_log_archive\\%f" ')
- db 122 GB
- backup full of PostgreSQL with pg_basebackup (parameters -Ft -z) folder
W:\pg_backup. We delete the replicated transaction logs with
pg_archivecleanup in W:\pg_log_archive

Problem:
backup fails when the base.tar.gz achieve di 4 GB with pg_basebackup: error:
could not stat file
"W:\POSTGRES\pg_backup\Base-Backup_2021-02-05_103921/base.tar.gz": Unknown
error.

When we used Postgresql 9.6 it worked correctly.

Thanks in advance