Subs out of sync

Hello,

I am kinda noob with Plex. Not using it for a long time, But I have a little problem with my subtitles and I think you guys can help me with that.

I download movies and series that I put on Plex.
I let Plex automatically download subtitles from opensubtitles.org
Plex download Dutch and Englisch subtitles.
Both subtitles are completely out of sync…
I updated Plex Server to the newest Update.

The server has been rebooted.

The server has enough resources for this.

Does someone got any tips for this problem?