I pulled this from the CodeWalker discord, all credit goes to DPS.
It’s interiorproxies.meta
You have to register your milo ymap in a specific order according to dlc
Since we are on FiveM patch, follow the mp christmas interiorproxies.meta
And add up the number of interiors in that file
This is something I discovered after making dozens of interiors
If you don’t register your interior in that meta file, you will have flickers when people go through portals and invisibility issues through the interior.
So e.g if the interiorproxies.meta for mpchristmas starts at 69 (I don’t know the actual number I’m not actually at my PC), you have to make your interiorproxies.meta start at 70.
It looks something like this
Start at 1069. When the mpvinewood update gets pushed to fivem you will need to readjust that startFrom value to respect the order in mpvinewoods interiorproxies.meta
and a bit more just so you don’t waste your time trying to make it work
resource_manifest_version “77731fab-63ca-442c-a67b-abc70f28dfa5”
data_file “INTERIOR_PROXY_ORDER_FILE” “interiorproxies.meta”
files {
"interiorproxies.meta"}