Why are my metro tiles disarranging on its own at random times after start-up?

[Windows Central Question]

I updated to the most recent insider preview build last Saturday. So far, I've experienced this problem twice. When I log-in, my tiles are disarranged and resized. I have to rearrange them again. It doesn't happen all the time. As I've said, it only happened twice so far. It might also be important to note that the second time, I had to restart several times because the search feature doesn't work. After the 3rd restart, the tiles disarranged but the search feature is back.