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Date & Time: 21:00 28/10/23
Frequency: Sometimes, guaranteed to happen with characters if it's happened before
World name: Light
Character name: Tari Dainashi
Retainer name: Irrelevant
NPC name: Irrelevant
Monster name: Irrelevant
Class/Level: Sage Lv90
Party or solo: Solo
Area and coordinates: Friends List
Housing: Yes
Steps:
1. Rightclick Estate Teleportation on that specific friend
2. See nothing in it
3. Rightclick a different friend
4. See the Apartments and/or Private Estate and Free Company Estate options, even if the first and second friend are in the same free company
*Add more steps if necessary

Connection Specs
- Type of internet connection/provider: Wi-Fi/BT
- Modem maker/model number: Intel

■ PC Specs

To obtain the system information, open the FFXIV launcher and select Config → System Information → Display.

-=-=-=-=- System Information -=-=-=-=-
I really don't see how this is relevant to a server-side issue.
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If this issue is only one due to a friend having since unfriended you, then that's its own bug and the friendship should be severed on both sides.