Sir my 4 resacrh delete new update after YAK3P I225 LA7B-20 YAK3U

i don’t buy any of them until I’ve researched 6 vehicles, and when the update came, I realized that only the vehicle I’m researching now remained, I’ve researched 4 vehicles, but only 1 of them still seems to be being investigated

You sure they are not all placed in the same folder?

how to take care?

nice bug or idk?