❔ AutoSize always shrinks my control to 1 px even with content

I have a User Control that has 3 panels in it. One docked to the top, one to fill and one to the bottom.
Both the top and bottom panel have content in them and dont have auto size set. Yet for some reason if I enable auto size on the main Control, it shrinks down to the smalles possible size!

I really don't understand why this happens.