Xipocado's Medallion is lost if medallions are full.

If this isn't a bug it's just a case of bad design and it's very frustrating.

I went into the temple with two upgrade medallions in store because there were no rooms worth upgrading. I picked up a 3rd medallion in the temple. Then I killed the architect who dropped Xipocado's medallion. Alva spawned in and took it. When I portalled out there was no medallion, presumably because you have maximum 3 medallions (why, how heavy are they?), Doriani complained that I hadn't used the medallion so we'd have to do it all again to which Alva said "Oh dear!". Sorry, this is just not good!