Nothing in "Files Deleted" after encryption

Hello!

I’v meet an error after enabling the data encryption.
I’v no files in “Files Deleted” when I remove a simple file like a .txt with my user.

Did anyone have encounter this problem or have a solution for that?

Thanks a lot!

HERES MY CONF:
Debian 9.6 | Php 7.0 | Apache 2.4.5 and MySQL 10.1.37.
I’v the last NextCloud 15.0.2 (stable)