MySql Community server - Data lost !! (no replies)

Hello,

I Have a strange problem and I don't have any idea why.

I've installed a MySql Community Server on my OVH server.

And sometimes (it happends two times now) ALL THE MYSQL data are restored to a sepcific date !!!
For exemple, the 6th october, all the data (schemas, users, rights . . .) updated this month was lost. It's like the data were restored to a specific date (around the 6th september).

Someone have ever heard abount this ? It happend during the night, like if there is a backUp or routine on OHV servers . . .

It's really unconfortable.

Thanks.