translation auto deleted

Hi, thanks for creating this wonderful plugin, it really helps with my project. I am currently using this plugin on a demo site which I plan to later use it for live site as well. I encountered something weird today I hope you can help.

I noticed today that all the translation on my site are gone so I perform a restore of my latest backup. When the site restoration was completed, all my translation are back but after a few seconds the site goes into maintenance mode and when it is back up, all my translation are gone again. Any idea? this is weird and I can’t think of anything right now what can cause this.

I am using this plugin to translate the default wording to other (same language)