Apple TV wants me to buy again the same movie

Dear community,

I've been buying movies on my apple TV since 2009.

Recently, I realised that some movies I bought in the past are not in my library anymore: if i search for them, the apple tv propose me to buy them.

I checked again my purchase history: I bought those movies (with this account).

Would someone know if I can restore those purchase, or if I need to contact Apple?