Beast den upgrade does not work if beast den has been previously sold

Repro instructions:

1) Build 3*3 beast den.

2) Sell all your beast den tiles.

3) Purchase "Beast Den Upgrade" from the veins of evil.

4) Build 3*3 beast den.

Although the central prop looks like the upgraded version, when you click on it, only Oculus and Skarg will be present in the menu.