ownCloud ignore my MP4 and .rar files on sync

I am having issues with my ownCloud syncing mp4’s and rar files sometimes I get an error saying can’t sync mp4 and rar files. Sometimes the client application ignores them as well as sometimes it displays that the files are locked.
Error from client:
https://share.teamhusky.net/ownclouderror.JPG
Server info:

Database
Server: Localhost via UNIX socket
Server type: MariaDB
Server version: 10.1.24-MariaDB-cll-lve - MariaDB Server
Protocol version: 10
User: teamhusk@localhost
Server charset: UTF-8 Unicode (utf8)

PHP:
cpsrvd 11.68.0.9
Database client version: libmysql - 5.1.73
PHP extension: mysqliDocumentation curlDocumentation mbstringDocumentation
PHP version: 5.6.30

ownCloud:
Server:
version: 10.0.3.
https://share.teamhusky.net/owncloud.log
Client: V2.3.4 build 8624

I did the following search Search results for 'file is locked' - ownCloud Central scanned through the found threads and found File is locked - how to unlock which might help.

I checked and everything seems to be fine there I got a new error just now: <img src=“/uploads/db1708/original/2X/1/17b68117b811717a64d0405b9930c6e3dea7ce3a.JPG” width=“431” height=“

499”>

Seems to me that your remote server has some performance issues and takes too long to respond. Might worth to do some performance tweaks on PHP/MySQL/Operating System level.

@edlaika Ping? Did you find anything out?