Onsen lot on Mt. Komorebi can’t be changed to other lot types

Hey everyone. I’m having a very frustrating time handling the lot on Mt. Komorebi where the Onsen is originally set. I want to change it to a rental, and I cannot do that no matter how many times I try.

Here’s the many things I have tried:

• Trying to change the lot type directly from the drop-down menu on the upper left corner. No luck. The only lot type selectable is the one currently in use (read bulletpoint 2 for clarification on this).
• Placing a lot imported from the Gallery that has a different lot type. This changes the lot type, but it locks it as is. Imported a residential lot? Lot type menu will now only show residential as the only option. Imported a karaoke bar lot? Lot type menu will now only show karaoke bar as the only option. Etcetera, etcetera.
• Bulldozing the current lot, exiting to world view and loading empty lot again. Only lot type selectable is the last one that was set.

Can someone try to replicate this issue in their game and see what luck they have with this? I’ve tested the other adjacent lots to this one and I haven’t had this problem — so it’s only present in the Onsen lot.

Many thanks for all suggestions.