[Prime blueprints disappeared from foundry]

So...I opened warframe just like every other day, went in the foundry, and was about to check if i had a prime blueprint, and I saw 3 prime blueprints missing in my foundry...is this a bug?

Ash prime chassis / systems and Ember prime helmet randomly disappeared from my foudnry with no reason...what can I do?

 

I was about to sell ash prime set...