Defensive pios have too many upgrades.
You know what, I have an idea, ill see if I can move around where the icons pop up. I think that the medbunker only dissapears if you have "defensive minefields" T1 cause that would give pios 2 more upgrades when there are only room for one.
If I put the x1 mine at the end, then it will be put behind the vet icon when you have both medbunkers and defensive minefields clicked.
and when you fix it, many shall cheer and have cries of love for you!