Aircraft need to be re-downloaded bug

So I have live+, and I have been flying a while the last few days, and I saw I needed to re-download the cirrus sr22 again. I thought it was from the update and I forgot it, but I wasn’t on wifi and I didn’t want to use data. So I flew the a320, and then when I finished the flight it de-downloaded too! Then i tried a few more planes, and all of them are disappearing!image

Yeah that happens to me sometimes, I don’t know why.