Instance.UniqueId returns incorrect value when multiple places with colliding IDs are loaded

[BossSpax]

Proof:

place 1:

place 2:

The ID should be 643079e.. for both, but the actual result is

The IDs are both correct when the other deserializePlace call is removed.
This issue seems to have slipped through because the automated test for UniqueId on this repo only loaded one place instead of two.