V list on the very first turn of a game can show you monsters you can not actually see

[NetSysFire]

Describe the bug

Noticed while testing stuff.

Attach save file

n/a. this is in-memory only, so attaching a save will not have any effect.

Steps to reproduce

1. Create a character and spawn in a potentially busy location, like road_nesw_manhole.
2. Look around with V, go through the entire list.
3. See screenshot.
4. Wait a single turn.
5. Its gone.

Expected behavior

Generate the vision cache a bit earlier.

@esotericist helped determine the cause of the issue in the devcord.
Since this is of quite low gameplay impact I assigned this low priority.

Screenshots

No response

Versions and configuration

• OS: Linux
  • OS Version: LSB Version: n/a; Distributor ID: Arch; Description: Arch Linux; Release: rolling; Codename: n/a;
• Game Version: cc4cb54 [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food],
  Portal Storms Ignore NPCs [personal_portal_storms],
  Slowdown Fungal Growth [no_fungal_growth],
  Bionic Professions [package_bionic_professions]
  ]

Additional context

No response

[NetSysFire]

It happened again.