Can people lose movie tickets when buying them with diamonds in Hay Day?
Your answer is from official HayDay already;
HayDay Facebook Page Post
The movie ticket is a feature that is assigned to a random group of players and they may appear & disappear from the farms at any time. We hope you get your chance soon! Note: this feature is currently only available on the iOS version of Hay Day.
Anyway, I can wish you luck!
I lost my movie tickets after only spending $1.99 for diamonds. When I asked Supercell about it, I got the same standard answer.