Slot shows (wrong) but cannot be booked (correct)

[Valentina R]

Here are the product settings to reproduce:

Staff rules (boat 1, boat 2, boat 3):

‌

When booking the 10:00 slot, we expected this to not be available anymore, but the other slots should still be available. And that’s how it works. The only issue is that the 10:00 is still shown but it cannot be booked:

‌

Reported here.