datalife engine - upload file to the server and the file name cut down

Question

I use Data life engine CMS and when I upload a file to the server the file names are cut.

For example: I upload a file to the server with the name:

php-fusion-v7-nusirasinek.lt-template

and after the upload the file name is cut like this:

1484383015_-fusion-v7-nusirasinek.lt-template

How can I keep the full name?

1484383015_php-fusion-v7-nusirasinek.lt-template