Stuck at so many points

Hi,

My backup and upload to gdrive stucks at so many different points. But sometimes works as well.

[INFO] Backup WD 1.0.13
[INFO] PHP version: 7.2.0, PHP SAPI: litespeed, OS: Linux (64 bit)
[INFO] Job Name: Plugins, ID: 10
[INFO] Log Level: normal
[INFO] Log file is: backupwd_log_8183ae_2018-01-01_16-42-23.html
[INFO] Backup file is: plugins_8183ae_2018-01-01_16-42-23.zip
[01-Jan-2018 16:42:23] 1. Attempted to create a list of files to backup.
[01-Jan-2018 16:42:23] "wp-config.php" file was added to backup file list.
[01-Jan-2018 16:42:23] ".htaccess" file was added to backup file list.
[01-Jan-2018 16:42:23] 339 folders were added to backup.
[01-Jan-2018 16:42:23] 1. Attempted to create backup archive.
...
...
...
[01-Jan-2018 16:42:30] /home/xxx/public_html/wp-content/plugins/xxx/Classes/Sentry/sentry-php-master/lib/Raven folder has been compressed as an archive.

and then nothing.
Or another:

...
...
...
[01-Jan-2018 16:45:11] Files were compressed as ZipArchive.

and nothing more.
or another:

...
...
...
[01-Jan-2018 16:46:45] Files were compressed as ZipArchive.
[01-Jan-2018 16:46:53] Backup archive was created.
[01-Jan-2018 16:46:53] 1381 files with 7,55 MB are added to backup archive.
[01-Jan-2018 16:46:53] 1. Attempted to upload backup file to Google Drive.

and nothing more.

But at that 6-7 tries half of the jobs worked perfectly.
I have no idea what is the problem.

It would be great if i get some help.

Cheers